19880510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 41247360

約数和(自身を除く): 21366850

約数列:

[1, 2, 5, 10, 13, 23, 26, 46, 61, 65, 109, 115, 122, 130, 218, 230, 299, 305, 545, 598, 610, 793, 1090, 1403, 1417, 1495, 1586, 2507, 2806, 2834, 2990, 3965, 5014, 6649, 7015, 7085, 7930, 12535, 13298, 14030, 14170, 18239, 25070, 32591, 33245, 36478, 65182, 66490, 86437, 91195, 152927, 162955, 172874, 182390, 305854, 325910, 432185, 764635, 864370, 1529270, 1988051, 3976102, 9940255, 19880510]

約数ペア:

[(1, 19880510), (2, 9940255), (5, 3976102), (10, 1988051), (13, 1529270), (23, 864370), (26, 764635), (46, 432185), (61, 325910), (65, 305854), (109, 182390), (115, 172874), (122, 162955), (130, 152927), (218, 91195), (230, 86437), (299, 66490), (305, 65182), (545, 36478), (598, 33245), (610, 32591), (793, 25070), (1090, 18239), (1403, 14170), (1417, 14030), (1495, 13298), (1586, 12535), (2507, 7930), (2806, 7085), (2834, 7015), (2990, 6649), (3965, 5014)]