21645260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1699}}^1$

素因数の和:1735

約数の個数: 72

約数和(自身を含む): 56977200

約数和(自身を除く): 35331940

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1699, 1820, 2548, 3185, 3398, 6370, 6796, 8495, 11893, 12740, 16990, 22087, 23786, 33980, 44174, 47572, 59465, 83251, 88348, 110435, 118930, 154609, 166502, 220870, 237860, 309218, 333004, 416255, 441740, 618436, 773045, 832510, 1082263, 1546090, 1665020, 2164526, 3092180, 4329052, 5411315, 10822630, 21645260]

約数ペア:

[(1, 21645260), (2, 10822630), (4, 5411315), (5, 4329052), (7, 3092180), (10, 2164526), (13, 1665020), (14, 1546090), (20, 1082263), (26, 832510), (28, 773045), (35, 618436), (49, 441740), (52, 416255), (65, 333004), (70, 309218), (91, 237860), (98, 220870), (130, 166502), (140, 154609), (182, 118930), (196, 110435), (245, 88348), (260, 83251), (364, 59465), (455, 47572), (490, 44174), (637, 33980), (910, 23786), (980, 22087), (1274, 16990), (1699, 12740), (1820, 11893), (2548, 8495), (3185, 6796), (3398, 6370)]