81636920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{659}}^1$

素因数の和:852

約数の個数: 64

約数和(自身を含む): 194832000

約数和(自身を除く): 113195080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 163, 190, 326, 380, 652, 659, 760, 815, 1304, 1318, 1630, 2636, 3097, 3260, 3295, 5272, 6194, 6520, 6590, 12388, 12521, 13180, 15485, 24776, 25042, 26360, 30970, 50084, 61940, 62605, 100168, 107417, 123880, 125210, 214834, 250420, 429668, 500840, 537085, 859336, 1074170, 2040923, 2148340, 4081846, 4296680, 8163692, 10204615, 16327384, 20409230, 40818460, 81636920]

約数ペア:

[(1, 81636920), (2, 40818460), (4, 20409230), (5, 16327384), (8, 10204615), (10, 8163692), (19, 4296680), (20, 4081846), (38, 2148340), (40, 2040923), (76, 1074170), (95, 859336), (152, 537085), (163, 500840), (190, 429668), (326, 250420), (380, 214834), (652, 125210), (659, 123880), (760, 107417), (815, 100168), (1304, 62605), (1318, 61940), (1630, 50084), (2636, 30970), (3097, 26360), (3260, 25042), (3295, 24776), (5272, 15485), (6194, 13180), (6520, 12521), (6590, 12388)]