209995240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1861}}^1$

素因数の和:1923

約数の個数: 128

約数和(自身を含む): 600606720

約数和(自身を除く): 390611480

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 31, 35, 40, 52, 56, 62, 65, 70, 91, 104, 124, 130, 140, 155, 182, 217, 248, 260, 280, 310, 364, 403, 434, 455, 520, 620, 728, 806, 868, 910, 1085, 1240, 1612, 1736, 1820, 1861, 2015, 2170, 2821, 3224, 3640, 3722, 4030, 4340, 5642, 7444, 8060, 8680, 9305, 11284, 13027, 14105, 14888, 16120, 18610, 22568, 24193, 26054, 28210, 37220, 48386, 52108, 56420, 57691, 65135, 74440, 96772, 104216, 112840, 115382, 120965, 130270, 169351, 193544, 230764, 241930, 260540, 288455, 338702, 403837, 461528, 483860, 521080, 576910, 677404, 749983, 807674, 846755, 967720, 1153820, 1354808, 1499966, 1615348, 1693510, 2019185, 2307640, 2999932, 3230696, 3387020, 3749915, 4038370, 5249881, 5999864, 6774040, 7499830, 8076740, 10499762, 14999660, 16153480, 20999524, 26249405, 29999320, 41999048, 52498810, 104997620, 209995240]

約数ペア:

[(1, 209995240), (2, 104997620), (4, 52498810), (5, 41999048), (7, 29999320), (8, 26249405), (10, 20999524), (13, 16153480), (14, 14999660), (20, 10499762), (26, 8076740), (28, 7499830), (31, 6774040), (35, 5999864), (40, 5249881), (52, 4038370), (56, 3749915), (62, 3387020), (65, 3230696), (70, 2999932), (91, 2307640), (104, 2019185), (124, 1693510), (130, 1615348), (140, 1499966), (155, 1354808), (182, 1153820), (217, 967720), (248, 846755), (260, 807674), (280, 749983), (310, 677404), (364, 576910), (403, 521080), (434, 483860), (455, 461528), (520, 403837), (620, 338702), (728, 288455), (806, 260540), (868, 241930), (910, 230764), (1085, 193544), (1240, 169351), (1612, 130270), (1736, 120965), (1820, 115382), (1861, 112840), (2015, 104216), (2170, 96772), (2821, 74440), (3224, 65135), (3640, 57691), (3722, 56420), (4030, 52108), (4340, 48386), (5642, 37220), (7444, 28210), (8060, 26054), (8680, 24193), (9305, 22568), (11284, 18610), (13027, 16120), (14105, 14888)]