21117220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{1583}}^1$

素因数の和:1644

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26782940

約数列:

[1, 2, 4, 5, 10, 20, 23, 29, 46, 58, 92, 115, 116, 145, 230, 290, 460, 580, 667, 1334, 1583, 2668, 3166, 3335, 6332, 6670, 7915, 13340, 15830, 31660, 36409, 45907, 72818, 91814, 145636, 182045, 183628, 229535, 364090, 459070, 728180, 918140, 1055861, 2111722, 4223444, 5279305, 10558610, 21117220]

約数ペア:

[(1, 21117220), (2, 10558610), (4, 5279305), (5, 4223444), (10, 2111722), (20, 1055861), (23, 918140), (29, 728180), (46, 459070), (58, 364090), (92, 229535), (115, 183628), (116, 182045), (145, 145636), (230, 91814), (290, 72818), (460, 45907), (580, 36409), (667, 31660), (1334, 15830), (1583, 13340), (2668, 7915), (3166, 6670), (3335, 6332)]