21587840

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{379}}^1$

素因数の和:487

約数の個数: 64

約数和(自身を含む): 52326000

約数和(自身を除く): 30738160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 379, 445, 640, 712, 758, 890, 1424, 1516, 1780, 1895, 2848, 3032, 3560, 3790, 5696, 6064, 7120, 7580, 11392, 12128, 14240, 15160, 24256, 28480, 30320, 33731, 48512, 56960, 60640, 67462, 121280, 134924, 168655, 242560, 269848, 337310, 539696, 674620, 1079392, 1349240, 2158784, 2698480, 4317568, 5396960, 10793920, 21587840]

約数ペア:

[(1, 21587840), (2, 10793920), (4, 5396960), (5, 4317568), (8, 2698480), (10, 2158784), (16, 1349240), (20, 1079392), (32, 674620), (40, 539696), (64, 337310), (80, 269848), (89, 242560), (128, 168655), (160, 134924), (178, 121280), (320, 67462), (356, 60640), (379, 56960), (445, 48512), (640, 33731), (712, 30320), (758, 28480), (890, 24256), (1424, 15160), (1516, 14240), (1780, 12128), (1895, 11392), (2848, 7580), (3032, 7120), (3560, 6064), (3790, 5696)]