81121140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1663}}^1$

素因数の和:1949

約数の個数: 72

約数和(自身を含む): 247123968

約数和(自身を除く): 166002828

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 271, 542, 813, 1084, 1355, 1626, 1663, 2439, 2710, 3252, 3326, 4065, 4878, 4989, 5420, 6652, 8130, 8315, 9756, 9978, 12195, 14967, 16260, 16630, 19956, 24390, 24945, 29934, 33260, 48780, 49890, 59868, 74835, 99780, 149670, 299340, 450673, 901346, 1352019, 1802692, 2253365, 2704038, 4056057, 4506730, 5408076, 6760095, 8112114, 9013460, 13520190, 16224228, 20280285, 27040380, 40560570, 81121140]

約数ペア:

[(1, 81121140), (2, 40560570), (3, 27040380), (4, 20280285), (5, 16224228), (6, 13520190), (9, 9013460), (10, 8112114), (12, 6760095), (15, 5408076), (18, 4506730), (20, 4056057), (30, 2704038), (36, 2253365), (45, 1802692), (60, 1352019), (90, 901346), (180, 450673), (271, 299340), (542, 149670), (813, 99780), (1084, 74835), (1355, 59868), (1626, 49890), (1663, 48780), (2439, 33260), (2710, 29934), (3252, 24945), (3326, 24390), (4065, 19956), (4878, 16630), (4989, 16260), (5420, 14967), (6652, 12195), (8130, 9978), (8315, 9756)]