81025360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^3\times {\mathrm{461}}^1$

素因数の和:513

約数の個数: 80

約数和(自身を含む): 204518160

約数和(自身を除く): 123492800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 461, 520, 676, 845, 922, 1040, 1352, 1690, 1844, 2197, 2305, 2704, 3380, 3688, 4394, 4610, 5993, 6760, 7376, 8788, 9220, 10985, 11986, 13520, 17576, 18440, 21970, 23972, 29965, 35152, 36880, 43940, 47944, 59930, 77909, 87880, 95888, 119860, 155818, 175760, 239720, 311636, 389545, 479440, 623272, 779090, 1012817, 1246544, 1558180, 2025634, 3116360, 4051268, 5064085, 6232720, 8102536, 10128170, 16205072, 20256340, 40512680, 81025360]

約数ペア:

[(1, 81025360), (2, 40512680), (4, 20256340), (5, 16205072), (8, 10128170), (10, 8102536), (13, 6232720), (16, 5064085), (20, 4051268), (26, 3116360), (40, 2025634), (52, 1558180), (65, 1246544), (80, 1012817), (104, 779090), (130, 623272), (169, 479440), (208, 389545), (260, 311636), (338, 239720), (461, 175760), (520, 155818), (676, 119860), (845, 95888), (922, 87880), (1040, 77909), (1352, 59930), (1690, 47944), (1844, 43940), (2197, 36880), (2305, 35152), (2704, 29965), (3380, 23972), (3688, 21970), (4394, 18440), (4610, 17576), (5993, 13520), (6760, 11986), (7376, 10985), (8788, 9220)]