81295020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{857}}^1$

素因数の和:920

約数の個数: 144

約数和(自身を含む): 269837568

約数和(自身を除く): 188542548

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 31, 34, 36, 45, 51, 60, 62, 68, 85, 90, 93, 102, 124, 153, 155, 170, 180, 186, 204, 255, 279, 306, 310, 340, 372, 465, 510, 527, 558, 612, 620, 765, 857, 930, 1020, 1054, 1116, 1395, 1530, 1581, 1714, 1860, 2108, 2571, 2635, 2790, 3060, 3162, 3428, 4285, 4743, 5142, 5270, 5580, 6324, 7713, 7905, 8570, 9486, 10284, 10540, 12855, 14569, 15426, 15810, 17140, 18972, 23715, 25710, 26567, 29138, 30852, 31620, 38565, 43707, 47430, 51420, 53134, 58276, 72845, 77130, 79701, 87414, 94860, 106268, 131121, 132835, 145690, 154260, 159402, 174828, 218535, 239103, 262242, 265670, 291380, 318804, 398505, 437070, 451639, 478206, 524484, 531340, 655605, 797010, 874140, 903278, 956412, 1195515, 1311210, 1354917, 1594020, 1806556, 2258195, 2391030, 2622420, 2709834, 4064751, 4516390, 4782060, 5419668, 6774585, 8129502, 9032780, 13549170, 16259004, 20323755, 27098340, 40647510, 81295020]

約数ペア:

[(1, 81295020), (2, 40647510), (3, 27098340), (4, 20323755), (5, 16259004), (6, 13549170), (9, 9032780), (10, 8129502), (12, 6774585), (15, 5419668), (17, 4782060), (18, 4516390), (20, 4064751), (30, 2709834), (31, 2622420), (34, 2391030), (36, 2258195), (45, 1806556), (51, 1594020), (60, 1354917), (62, 1311210), (68, 1195515), (85, 956412), (90, 903278), (93, 874140), (102, 797010), (124, 655605), (153, 531340), (155, 524484), (170, 478206), (180, 451639), (186, 437070), (204, 398505), (255, 318804), (279, 291380), (306, 265670), (310, 262242), (340, 239103), (372, 218535), (465, 174828), (510, 159402), (527, 154260), (558, 145690), (612, 132835), (620, 131121), (765, 106268), (857, 94860), (930, 87414), (1020, 79701), (1054, 77130), (1116, 72845), (1395, 58276), (1530, 53134), (1581, 51420), (1714, 47430), (1860, 43707), (2108, 38565), (2571, 31620), (2635, 30852), (2790, 29138), (3060, 26567), (3162, 25710), (3428, 23715), (4285, 18972), (4743, 17140), (5142, 15810), (5270, 15426), (5580, 14569), (6324, 12855), (7713, 10540), (7905, 10284), (8570, 9486)]