21031903880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{367}}^1\times {\mathrm{577}}^1$

素因数の和:1159

約数の個数: 128

約数和(自身を含む): 51457351680

約数和(自身を除く): 30425447800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 191, 260, 367, 382, 520, 577, 734, 764, 955, 1154, 1468, 1528, 1835, 1910, 2308, 2483, 2885, 2936, 3670, 3820, 4616, 4771, 4966, 5770, 7340, 7501, 7640, 9542, 9932, 11540, 12415, 14680, 15002, 19084, 19864, 23080, 23855, 24830, 30004, 37505, 38168, 47710, 49660, 60008, 70097, 75010, 95420, 99320, 110207, 140194, 150020, 190840, 211759, 220414, 280388, 300040, 350485, 423518, 440828, 551035, 560776, 700970, 847036, 881656, 911261, 1058795, 1102070, 1401940, 1432691, 1694072, 1822522, 2117590, 2204140, 2752867, 2803880, 2865382, 3645044, 4235180, 4408280, 4556305, 5505734, 5730764, 7163455, 7290088, 8470360, 9112610, 11011468, 11461528, 13764335, 14326910, 18225220, 22022936, 27528670, 28653820, 36450440, 40445969, 55057340, 57307640, 80891938, 110114680, 161783876, 202229845, 323567752, 404459690, 525797597, 808919380, 1051595194, 1617838760, 2103190388, 2628987985, 4206380776, 5257975970, 10515951940, 21031903880]

約数ペア:

[(1, 21031903880), (2, 10515951940), (4, 5257975970), (5, 4206380776), (8, 2628987985), (10, 2103190388), (13, 1617838760), (20, 1051595194), (26, 808919380), (40, 525797597), (52, 404459690), (65, 323567752), (104, 202229845), (130, 161783876), (191, 110114680), (260, 80891938), (367, 57307640), (382, 55057340), (520, 40445969), (577, 36450440), (734, 28653820), (764, 27528670), (955, 22022936), (1154, 18225220), (1468, 14326910), (1528, 13764335), (1835, 11461528), (1910, 11011468), (2308, 9112610), (2483, 8470360), (2885, 7290088), (2936, 7163455), (3670, 5730764), (3820, 5505734), (4616, 4556305), (4771, 4408280), (4966, 4235180), (5770, 3645044), (7340, 2865382), (7501, 2803880), (7640, 2752867), (9542, 2204140), (9932, 2117590), (11540, 1822522), (12415, 1694072), (14680, 1432691), (15002, 1401940), (19084, 1102070), (19864, 1058795), (23080, 911261), (23855, 881656), (24830, 847036), (30004, 700970), (37505, 560776), (38168, 551035), (47710, 440828), (49660, 423518), (60008, 350485), (70097, 300040), (75010, 280388), (95420, 220414), (99320, 211759), (110207, 190840), (140194, 150020)]