21551530

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2153}}^1$

素因数の和:2191

約数の個数: 64

約数和(自身を含む): 52109568

約数和(自身を除く): 30558038

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 130, 143, 154, 182, 286, 385, 455, 715, 770, 910, 1001, 1430, 2002, 2153, 4306, 5005, 10010, 10765, 15071, 21530, 23683, 27989, 30142, 47366, 55978, 75355, 118415, 139945, 150710, 165781, 195923, 236830, 279890, 307879, 331562, 391846, 615758, 828905, 979615, 1539395, 1657810, 1959230, 2155153, 3078790, 4310306, 10775765, 21551530]

約数ペア:

[(1, 21551530), (2, 10775765), (5, 4310306), (7, 3078790), (10, 2155153), (11, 1959230), (13, 1657810), (14, 1539395), (22, 979615), (26, 828905), (35, 615758), (55, 391846), (65, 331562), (70, 307879), (77, 279890), (91, 236830), (110, 195923), (130, 165781), (143, 150710), (154, 139945), (182, 118415), (286, 75355), (385, 55978), (455, 47366), (715, 30142), (770, 27989), (910, 23683), (1001, 21530), (1430, 15071), (2002, 10765), (2153, 10010), (4306, 5005)]