20416760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:181

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 37644040

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 71, 79, 91, 104, 130, 140, 142, 158, 182, 260, 280, 284, 316, 355, 364, 395, 455, 497, 520, 553, 568, 632, 710, 728, 790, 910, 923, 994, 1027, 1106, 1420, 1580, 1820, 1846, 1988, 2054, 2212, 2485, 2765, 2840, 3160, 3640, 3692, 3976, 4108, 4424, 4615, 4970, 5135, 5530, 5609, 6461, 7189, 7384, 8216, 9230, 9940, 10270, 11060, 11218, 12922, 14378, 18460, 19880, 20540, 22120, 22436, 25844, 28045, 28756, 32305, 35945, 36920, 39263, 41080, 44872, 51688, 56090, 57512, 64610, 71890, 72917, 78526, 112180, 129220, 143780, 145834, 157052, 196315, 224360, 258440, 287560, 291668, 314104, 364585, 392630, 510419, 583336, 729170, 785260, 1020838, 1458340, 1570520, 2041676, 2552095, 2916680, 4083352, 5104190, 10208380, 20416760]

約数ペア:

[(1, 20416760), (2, 10208380), (4, 5104190), (5, 4083352), (7, 2916680), (8, 2552095), (10, 2041676), (13, 1570520), (14, 1458340), (20, 1020838), (26, 785260), (28, 729170), (35, 583336), (40, 510419), (52, 392630), (56, 364585), (65, 314104), (70, 291668), (71, 287560), (79, 258440), (91, 224360), (104, 196315), (130, 157052), (140, 145834), (142, 143780), (158, 129220), (182, 112180), (260, 78526), (280, 72917), (284, 71890), (316, 64610), (355, 57512), (364, 56090), (395, 51688), (455, 44872), (497, 41080), (520, 39263), (553, 36920), (568, 35945), (632, 32305), (710, 28756), (728, 28045), (790, 25844), (910, 22436), (923, 22120), (994, 20540), (1027, 19880), (1106, 18460), (1420, 14378), (1580, 12922), (1820, 11218), (1846, 11060), (1988, 10270), (2054, 9940), (2212, 9230), (2485, 8216), (2765, 7384), (2840, 7189), (3160, 6461), (3640, 5609), (3692, 5530), (3976, 5135), (4108, 4970), (4424, 4615)]