20405440

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:87

約数の個数: 168

約数和(自身を含む): 58375296

約数和(自身を除く): 37969856

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 31, 32, 34, 40, 44, 55, 62, 64, 68, 80, 85, 88, 110, 121, 124, 136, 155, 160, 170, 176, 187, 220, 242, 248, 272, 310, 320, 340, 341, 352, 374, 440, 484, 496, 527, 544, 605, 620, 680, 682, 704, 748, 880, 935, 968, 992, 1054, 1088, 1210, 1240, 1360, 1364, 1496, 1705, 1760, 1870, 1936, 1984, 2057, 2108, 2420, 2480, 2635, 2720, 2728, 2992, 3410, 3520, 3740, 3751, 3872, 4114, 4216, 4840, 4960, 5270, 5440, 5456, 5797, 5984, 6820, 7480, 7502, 7744, 8228, 8432, 9680, 9920, 10285, 10540, 10912, 11594, 11968, 13640, 14960, 15004, 16456, 16864, 18755, 19360, 20570, 21080, 21824, 23188, 27280, 28985, 29920, 30008, 32912, 33728, 37510, 38720, 41140, 42160, 46376, 54560, 57970, 59840, 60016, 63767, 65824, 75020, 82280, 84320, 92752, 109120, 115940, 120032, 127534, 131648, 150040, 164560, 168640, 185504, 231880, 240064, 255068, 300080, 318835, 329120, 371008, 463760, 510136, 600160, 637670, 658240, 927520, 1020272, 1200320, 1275340, 1855040, 2040544, 2550680, 4081088, 5101360, 10202720, 20405440]

約数ペア:

[(1, 20405440), (2, 10202720), (4, 5101360), (5, 4081088), (8, 2550680), (10, 2040544), (11, 1855040), (16, 1275340), (17, 1200320), (20, 1020272), (22, 927520), (31, 658240), (32, 637670), (34, 600160), (40, 510136), (44, 463760), (55, 371008), (62, 329120), (64, 318835), (68, 300080), (80, 255068), (85, 240064), (88, 231880), (110, 185504), (121, 168640), (124, 164560), (136, 150040), (155, 131648), (160, 127534), (170, 120032), (176, 115940), (187, 109120), (220, 92752), (242, 84320), (248, 82280), (272, 75020), (310, 65824), (320, 63767), (340, 60016), (341, 59840), (352, 57970), (374, 54560), (440, 46376), (484, 42160), (496, 41140), (527, 38720), (544, 37510), (605, 33728), (620, 32912), (680, 30008), (682, 29920), (704, 28985), (748, 27280), (880, 23188), (935, 21824), (968, 21080), (992, 20570), (1054, 19360), (1088, 18755), (1210, 16864), (1240, 16456), (1360, 15004), (1364, 14960), (1496, 13640), (1705, 11968), (1760, 11594), (1870, 10912), (1936, 10540), (1984, 10285), (2057, 9920), (2108, 9680), (2420, 8432), (2480, 8228), (2635, 7744), (2720, 7502), (2728, 7480), (2992, 6820), (3410, 5984), (3520, 5797), (3740, 5456), (3751, 5440), (3872, 5270), (4114, 4960), (4216, 4840)]