398942720

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:522

約数の個数: 160

約数和(自身を含む): 1079502336

約数和(自身を除く): 680559616

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 64, 80, 88, 110, 124, 128, 155, 160, 176, 220, 248, 256, 310, 320, 341, 352, 440, 457, 496, 512, 620, 640, 682, 704, 880, 914, 992, 1240, 1280, 1364, 1408, 1705, 1760, 1828, 1984, 2285, 2480, 2560, 2728, 2816, 3410, 3520, 3656, 3968, 4570, 4960, 5027, 5456, 5632, 6820, 7040, 7312, 7936, 9140, 9920, 10054, 10912, 13640, 14080, 14167, 14624, 15872, 18280, 19840, 20108, 21824, 25135, 27280, 28160, 28334, 29248, 36560, 39680, 40216, 43648, 50270, 54560, 56668, 58496, 70835, 73120, 79360, 80432, 87296, 100540, 109120, 113336, 116992, 141670, 146240, 155837, 160864, 174592, 201080, 218240, 226672, 233984, 283340, 292480, 311674, 321728, 402160, 436480, 453344, 566680, 584960, 623348, 643456, 779185, 804320, 872960, 906688, 1133360, 1169920, 1246696, 1286912, 1558370, 1608640, 1813376, 2266720, 2493392, 2573824, 3116740, 3217280, 3626752, 4533440, 4986784, 6233480, 6434560, 7253504, 9066880, 9973568, 12466960, 12869120, 18133760, 19947136, 24933920, 36267520, 39894272, 49867840, 79788544, 99735680, 199471360, 398942720]

約数ペア:

[(1, 398942720), (2, 199471360), (4, 99735680), (5, 79788544), (8, 49867840), (10, 39894272), (11, 36267520), (16, 24933920), (20, 19947136), (22, 18133760), (31, 12869120), (32, 12466960), (40, 9973568), (44, 9066880), (55, 7253504), (62, 6434560), (64, 6233480), (80, 4986784), (88, 4533440), (110, 3626752), (124, 3217280), (128, 3116740), (155, 2573824), (160, 2493392), (176, 2266720), (220, 1813376), (248, 1608640), (256, 1558370), (310, 1286912), (320, 1246696), (341, 1169920), (352, 1133360), (440, 906688), (457, 872960), (496, 804320), (512, 779185), (620, 643456), (640, 623348), (682, 584960), (704, 566680), (880, 453344), (914, 436480), (992, 402160), (1240, 321728), (1280, 311674), (1364, 292480), (1408, 283340), (1705, 233984), (1760, 226672), (1828, 218240), (1984, 201080), (2285, 174592), (2480, 160864), (2560, 155837), (2728, 146240), (2816, 141670), (3410, 116992), (3520, 113336), (3656, 109120), (3968, 100540), (4570, 87296), (4960, 80432), (5027, 79360), (5456, 73120), (5632, 70835), (6820, 58496), (7040, 56668), (7312, 54560), (7936, 50270), (9140, 43648), (9920, 40216), (10054, 39680), (10912, 36560), (13640, 29248), (14080, 28334), (14167, 28160), (14624, 27280), (15872, 25135), (18280, 21824), (19840, 20108)]