21117720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13537}}^1$

素因数の和:13564

約数の個数: 64

約数和(自身を含む): 68231520

約数和(自身を除く): 47113800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13537, 27074, 40611, 54148, 67685, 81222, 108296, 135370, 162444, 175981, 203055, 270740, 324888, 351962, 406110, 527943, 541480, 703924, 812220, 879905, 1055886, 1407848, 1624440, 1759810, 2111772, 2639715, 3519620, 4223544, 5279430, 7039240, 10558860, 21117720]

約数ペア:

[(1, 21117720), (2, 10558860), (3, 7039240), (4, 5279430), (5, 4223544), (6, 3519620), (8, 2639715), (10, 2111772), (12, 1759810), (13, 1624440), (15, 1407848), (20, 1055886), (24, 879905), (26, 812220), (30, 703924), (39, 541480), (40, 527943), (52, 406110), (60, 351962), (65, 324888), (78, 270740), (104, 203055), (120, 175981), (130, 162444), (156, 135370), (195, 108296), (260, 81222), (312, 67685), (390, 54148), (520, 40611), (780, 27074), (1560, 13537)]