20581730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 43182720

約数和(自身を除く): 22600990

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 67, 85, 130, 134, 139, 170, 221, 278, 335, 442, 670, 695, 871, 1105, 1139, 1390, 1742, 1807, 2210, 2278, 2363, 3614, 4355, 4726, 5695, 8710, 9035, 9313, 11390, 11815, 14807, 18070, 18626, 23630, 29614, 30719, 46565, 61438, 74035, 93130, 121069, 148070, 153595, 158321, 242138, 307190, 316642, 605345, 791605, 1210690, 1583210, 2058173, 4116346, 10290865, 20581730]

約数ペア:

[(1, 20581730), (2, 10290865), (5, 4116346), (10, 2058173), (13, 1583210), (17, 1210690), (26, 791605), (34, 605345), (65, 316642), (67, 307190), (85, 242138), (130, 158321), (134, 153595), (139, 148070), (170, 121069), (221, 93130), (278, 74035), (335, 61438), (442, 46565), (670, 30719), (695, 29614), (871, 23630), (1105, 18626), (1139, 18070), (1390, 14807), (1742, 11815), (1807, 11390), (2210, 9313), (2278, 9035), (2363, 8710), (3614, 5695), (4355, 4726)]