261369486520

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1607}}^1\times {\mathrm{31039}}^1$

素因数の和:32788

約数の個数: 64

約数和(自身を含む): 592958361600

約数和(自身を除く): 331588875080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 1607, 2620, 3214, 5240, 6428, 8035, 12856, 16070, 31039, 32140, 62078, 64280, 124156, 155195, 210517, 248312, 310390, 421034, 620780, 842068, 1052585, 1241560, 1684136, 2105170, 4066109, 4210340, 8132218, 8420680, 16264436, 20330545, 32528872, 40661090, 49879673, 81322180, 99759346, 162644360, 199518692, 249398365, 399037384, 498796730, 997593460, 1995186920, 6534237163, 13068474326, 26136948652, 32671185815, 52273897304, 65342371630, 130684743260, 261369486520]

約数ペア:

[(1, 261369486520), (2, 130684743260), (4, 65342371630), (5, 52273897304), (8, 32671185815), (10, 26136948652), (20, 13068474326), (40, 6534237163), (131, 1995186920), (262, 997593460), (524, 498796730), (655, 399037384), (1048, 249398365), (1310, 199518692), (1607, 162644360), (2620, 99759346), (3214, 81322180), (5240, 49879673), (6428, 40661090), (8035, 32528872), (12856, 20330545), (16070, 16264436), (31039, 8420680), (32140, 8132218), (62078, 4210340), (64280, 4066109), (124156, 2105170), (155195, 1684136), (210517, 1241560), (248312, 1052585), (310390, 842068), (421034, 620780)]