21982720

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1$

素因数の和:331

約数の個数: 80

約数和(自身を含む): 54603648

約数和(自身を除く): 32620928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 277, 310, 320, 496, 512, 554, 620, 640, 992, 1108, 1240, 1280, 1385, 1984, 2216, 2480, 2560, 2770, 3968, 4432, 4960, 5540, 7936, 8587, 8864, 9920, 11080, 15872, 17174, 17728, 19840, 22160, 34348, 35456, 39680, 42935, 44320, 68696, 70912, 79360, 85870, 88640, 137392, 141824, 171740, 177280, 274784, 343480, 354560, 549568, 686960, 709120, 1099136, 1373920, 2198272, 2747840, 4396544, 5495680, 10991360, 21982720]

約数ペア:

[(1, 21982720), (2, 10991360), (4, 5495680), (5, 4396544), (8, 2747840), (10, 2198272), (16, 1373920), (20, 1099136), (31, 709120), (32, 686960), (40, 549568), (62, 354560), (64, 343480), (80, 274784), (124, 177280), (128, 171740), (155, 141824), (160, 137392), (248, 88640), (256, 85870), (277, 79360), (310, 70912), (320, 68696), (496, 44320), (512, 42935), (554, 39680), (620, 35456), (640, 34348), (992, 22160), (1108, 19840), (1240, 17728), (1280, 17174), (1385, 15872), (1984, 11080), (2216, 9920), (2480, 8864), (2560, 8587), (2770, 7936), (3968, 5540), (4432, 4960)]