21812910

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{431}}^1$

素因数の和:689

約数の個数: 64

約数和(自身を含む): 60217344

約数和(自身を除く): 38404434

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 241, 431, 482, 723, 862, 1205, 1293, 1446, 1687, 2155, 2410, 2586, 3017, 3374, 3615, 4310, 5061, 6034, 6465, 7230, 8435, 9051, 10122, 12930, 15085, 16870, 18102, 25305, 30170, 45255, 50610, 90510, 103871, 207742, 311613, 519355, 623226, 727097, 1038710, 1454194, 1558065, 2181291, 3116130, 3635485, 4362582, 7270970, 10906455, 21812910]

約数ペア:

[(1, 21812910), (2, 10906455), (3, 7270970), (5, 4362582), (6, 3635485), (7, 3116130), (10, 2181291), (14, 1558065), (15, 1454194), (21, 1038710), (30, 727097), (35, 623226), (42, 519355), (70, 311613), (105, 207742), (210, 103871), (241, 90510), (431, 50610), (482, 45255), (723, 30170), (862, 25305), (1205, 18102), (1293, 16870), (1446, 15085), (1687, 12930), (2155, 10122), (2410, 9051), (2586, 8435), (3017, 7230), (3374, 6465), (3615, 6034), (4310, 5061)]