18876520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1171}}^1$

素因数の和:1226

約数の個数: 64

約数和(自身を含む): 47255040

約数和(自身を除く): 28378520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1171, 1240, 1612, 2015, 2342, 3224, 4030, 4684, 5855, 8060, 9368, 11710, 15223, 16120, 23420, 30446, 36301, 46840, 60892, 72602, 76115, 121784, 145204, 152230, 181505, 290408, 304460, 363010, 471913, 608920, 726020, 943826, 1452040, 1887652, 2359565, 3775304, 4719130, 9438260, 18876520]

約数ペア:

[(1, 18876520), (2, 9438260), (4, 4719130), (5, 3775304), (8, 2359565), (10, 1887652), (13, 1452040), (20, 943826), (26, 726020), (31, 608920), (40, 471913), (52, 363010), (62, 304460), (65, 290408), (104, 181505), (124, 152230), (130, 145204), (155, 121784), (248, 76115), (260, 72602), (310, 60892), (403, 46840), (520, 36301), (620, 30446), (806, 23420), (1171, 16120), (1240, 15223), (1612, 11710), (2015, 9368), (2342, 8060), (3224, 5855), (4030, 4684)]