19919320

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:404

約数の個数: 64

約数和(自身を含む): 47250720

約数和(自身を除く): 27331400

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 43, 74, 86, 148, 172, 185, 215, 296, 313, 344, 370, 430, 626, 740, 860, 1252, 1480, 1565, 1591, 1720, 2504, 3130, 3182, 6260, 6364, 7955, 11581, 12520, 12728, 13459, 15910, 23162, 26918, 31820, 46324, 53836, 57905, 63640, 67295, 92648, 107672, 115810, 134590, 231620, 269180, 463240, 497983, 538360, 995966, 1991932, 2489915, 3983864, 4979830, 9959660, 19919320]

約数ペア:

[(1, 19919320), (2, 9959660), (4, 4979830), (5, 3983864), (8, 2489915), (10, 1991932), (20, 995966), (37, 538360), (40, 497983), (43, 463240), (74, 269180), (86, 231620), (148, 134590), (172, 115810), (185, 107672), (215, 92648), (296, 67295), (313, 63640), (344, 57905), (370, 53836), (430, 46324), (626, 31820), (740, 26918), (860, 23162), (1252, 15910), (1480, 13459), (1565, 12728), (1591, 12520), (1720, 11581), (2504, 7955), (3130, 6364), (3182, 6260)]