21513375

素因数分解:

$3^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1471}}^1$

素因数の和:1505

約数の個数: 48

約数和(自身を含む): 41793024

約数和(自身を除く): 20279649

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 125, 195, 225, 325, 375, 585, 975, 1125, 1471, 1625, 2925, 4413, 4875, 7355, 13239, 14625, 19123, 22065, 36775, 57369, 66195, 95615, 110325, 172107, 183875, 286845, 330975, 478075, 551625, 860535, 1434225, 1654875, 2390375, 4302675, 7171125, 21513375]

約数ペア:

[(1, 21513375), (3, 7171125), (5, 4302675), (9, 2390375), (13, 1654875), (15, 1434225), (25, 860535), (39, 551625), (45, 478075), (65, 330975), (75, 286845), (117, 183875), (125, 172107), (195, 110325), (225, 95615), (325, 66195), (375, 57369), (585, 36775), (975, 22065), (1125, 19123), (1471, 14625), (1625, 13239), (2925, 7355), (4413, 4875)]