28890440

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1471}}^1$

素因数の和:1973

約数の個数: 32

約数和(自身を含む): 65180160

約数和(自身を除く): 36289720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1471, 1964, 2455, 2942, 3928, 4910, 5884, 7355, 9820, 11768, 14710, 19640, 29420, 58840, 722261, 1444522, 2889044, 3611305, 5778088, 7222610, 14445220, 28890440]

約数ペア:

[(1, 28890440), (2, 14445220), (4, 7222610), (5, 5778088), (8, 3611305), (10, 2889044), (20, 1444522), (40, 722261), (491, 58840), (982, 29420), (1471, 19640), (1964, 14710), (2455, 11768), (2942, 9820), (3928, 7355), (4910, 5884)]