19870020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{1871}}^1$

素因数の和:1945

約数の個数: 72

約数和(自身を含む): 61326720

約数和(自身を除く): 41456700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 59, 60, 90, 118, 177, 180, 236, 295, 354, 531, 590, 708, 885, 1062, 1180, 1770, 1871, 2124, 2655, 3540, 3742, 5310, 5613, 7484, 9355, 10620, 11226, 16839, 18710, 22452, 28065, 33678, 37420, 56130, 67356, 84195, 110389, 112260, 168390, 220778, 331167, 336780, 441556, 551945, 662334, 993501, 1103890, 1324668, 1655835, 1987002, 2207780, 3311670, 3974004, 4967505, 6623340, 9935010, 19870020]

約数ペア:

[(1, 19870020), (2, 9935010), (3, 6623340), (4, 4967505), (5, 3974004), (6, 3311670), (9, 2207780), (10, 1987002), (12, 1655835), (15, 1324668), (18, 1103890), (20, 993501), (30, 662334), (36, 551945), (45, 441556), (59, 336780), (60, 331167), (90, 220778), (118, 168390), (177, 112260), (180, 110389), (236, 84195), (295, 67356), (354, 56130), (531, 37420), (590, 33678), (708, 28065), (885, 22452), (1062, 18710), (1180, 16839), (1770, 11226), (1871, 10620), (2124, 9355), (2655, 7484), (3540, 5613), (3742, 5310)]