21383440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{709}}^1$

素因数の和:764

約数の個数: 80

約数和(自身を含む): 55465200

約数和(自身を除く): 34081760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 80, 104, 116, 130, 145, 208, 232, 260, 290, 377, 464, 520, 580, 709, 754, 1040, 1160, 1418, 1508, 1885, 2320, 2836, 3016, 3545, 3770, 5672, 6032, 7090, 7540, 9217, 11344, 14180, 15080, 18434, 20561, 28360, 30160, 36868, 41122, 46085, 56720, 73736, 82244, 92170, 102805, 147472, 164488, 184340, 205610, 267293, 328976, 368680, 411220, 534586, 737360, 822440, 1069172, 1336465, 1644880, 2138344, 2672930, 4276688, 5345860, 10691720, 21383440]

約数ペア:

[(1, 21383440), (2, 10691720), (4, 5345860), (5, 4276688), (8, 2672930), (10, 2138344), (13, 1644880), (16, 1336465), (20, 1069172), (26, 822440), (29, 737360), (40, 534586), (52, 411220), (58, 368680), (65, 328976), (80, 267293), (104, 205610), (116, 184340), (130, 164488), (145, 147472), (208, 102805), (232, 92170), (260, 82244), (290, 73736), (377, 56720), (464, 46085), (520, 41122), (580, 36868), (709, 30160), (754, 28360), (1040, 20561), (1160, 18434), (1418, 15080), (1508, 14180), (1885, 11344), (2320, 9217), (2836, 7540), (3016, 7090), (3545, 6032), (3770, 5672)]