81406920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{487}}^1$

素因数の和:707

約数の個数: 128

約数和(自身を含む): 281088000

約数和(自身を除く): 199681080

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 199, 210, 280, 398, 420, 487, 597, 796, 840, 974, 995, 1194, 1393, 1461, 1592, 1948, 1990, 2388, 2435, 2786, 2922, 2985, 3409, 3896, 3980, 4179, 4776, 4870, 5572, 5844, 5970, 6818, 6965, 7305, 7960, 8358, 9740, 10227, 11144, 11688, 11940, 13636, 13930, 14610, 16716, 17045, 19480, 20454, 20895, 23880, 27272, 27860, 29220, 33432, 34090, 40908, 41790, 51135, 55720, 58440, 68180, 81816, 83580, 96913, 102270, 136360, 167160, 193826, 204540, 290739, 387652, 409080, 484565, 581478, 678391, 775304, 969130, 1162956, 1356782, 1453695, 1938260, 2035173, 2325912, 2713564, 2907390, 3391955, 3876520, 4070346, 5427128, 5814780, 6783910, 8140692, 10175865, 11629560, 13567820, 16281384, 20351730, 27135640, 40703460, 81406920]

約数ペア:

[(1, 81406920), (2, 40703460), (3, 27135640), (4, 20351730), (5, 16281384), (6, 13567820), (7, 11629560), (8, 10175865), (10, 8140692), (12, 6783910), (14, 5814780), (15, 5427128), (20, 4070346), (21, 3876520), (24, 3391955), (28, 2907390), (30, 2713564), (35, 2325912), (40, 2035173), (42, 1938260), (56, 1453695), (60, 1356782), (70, 1162956), (84, 969130), (105, 775304), (120, 678391), (140, 581478), (168, 484565), (199, 409080), (210, 387652), (280, 290739), (398, 204540), (420, 193826), (487, 167160), (597, 136360), (796, 102270), (840, 96913), (974, 83580), (995, 81816), (1194, 68180), (1393, 58440), (1461, 55720), (1592, 51135), (1948, 41790), (1990, 40908), (2388, 34090), (2435, 33432), (2786, 29220), (2922, 27860), (2985, 27272), (3409, 23880), (3896, 20895), (3980, 20454), (4179, 19480), (4776, 17045), (4870, 16716), (5572, 14610), (5844, 13930), (5970, 13636), (6818, 11940), (6965, 11688), (7305, 11144), (7960, 10227), (8358, 9740)]