19011980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{881}}^1$

素因数の和:986

約数の個数: 48

約数和(自身を含む): 43563744

約数和(自身を除く): 24551764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 83, 130, 166, 260, 332, 415, 830, 881, 1079, 1660, 1762, 2158, 3524, 4316, 4405, 5395, 8810, 10790, 11453, 17620, 21580, 22906, 45812, 57265, 73123, 114530, 146246, 229060, 292492, 365615, 731230, 950599, 1462460, 1901198, 3802396, 4752995, 9505990, 19011980]

約数ペア:

[(1, 19011980), (2, 9505990), (4, 4752995), (5, 3802396), (10, 1901198), (13, 1462460), (20, 950599), (26, 731230), (52, 365615), (65, 292492), (83, 229060), (130, 146246), (166, 114530), (260, 73123), (332, 57265), (415, 45812), (830, 22906), (881, 21580), (1079, 17620), (1660, 11453), (1762, 10790), (2158, 8810), (3524, 5395), (4316, 4405)]