21293600

素因数分解:

$2^5\times 5^2\times {\mathrm{43}}^1\times {\mathrm{619}}^1$

素因数の和:682

約数の個数: 72

約数和(自身を含む): 53277840

約数和(自身を除く): 31984240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 43, 50, 80, 86, 100, 160, 172, 200, 215, 344, 400, 430, 619, 688, 800, 860, 1075, 1238, 1376, 1720, 2150, 2476, 3095, 3440, 4300, 4952, 6190, 6880, 8600, 9904, 12380, 15475, 17200, 19808, 24760, 26617, 30950, 34400, 49520, 53234, 61900, 99040, 106468, 123800, 133085, 212936, 247600, 266170, 425872, 495200, 532340, 665425, 851744, 1064680, 1330850, 2129360, 2661700, 4258720, 5323400, 10646800, 21293600]

約数ペア:

[(1, 21293600), (2, 10646800), (4, 5323400), (5, 4258720), (8, 2661700), (10, 2129360), (16, 1330850), (20, 1064680), (25, 851744), (32, 665425), (40, 532340), (43, 495200), (50, 425872), (80, 266170), (86, 247600), (100, 212936), (160, 133085), (172, 123800), (200, 106468), (215, 99040), (344, 61900), (400, 53234), (430, 49520), (619, 34400), (688, 30950), (800, 26617), (860, 24760), (1075, 19808), (1238, 17200), (1376, 15475), (1720, 12380), (2150, 9904), (2476, 8600), (3095, 6880), (3440, 6190), (4300, 4952)]