28240240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:470

約数の個数: 80

約数和(自身を含む): 75709440

約数和(自身を除く): 47469200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 211, 239, 280, 422, 478, 560, 844, 956, 1055, 1195, 1477, 1673, 1688, 1912, 2110, 2390, 2954, 3346, 3376, 3824, 4220, 4780, 5908, 6692, 7385, 8365, 8440, 9560, 11816, 13384, 14770, 16730, 16880, 19120, 23632, 26768, 29540, 33460, 50429, 59080, 66920, 100858, 118160, 133840, 201716, 252145, 353003, 403432, 504290, 706006, 806864, 1008580, 1412012, 1765015, 2017160, 2824024, 3530030, 4034320, 5648048, 7060060, 14120120, 28240240]

約数ペア:

[(1, 28240240), (2, 14120120), (4, 7060060), (5, 5648048), (7, 4034320), (8, 3530030), (10, 2824024), (14, 2017160), (16, 1765015), (20, 1412012), (28, 1008580), (35, 806864), (40, 706006), (56, 504290), (70, 403432), (80, 353003), (112, 252145), (140, 201716), (211, 133840), (239, 118160), (280, 100858), (422, 66920), (478, 59080), (560, 50429), (844, 33460), (956, 29540), (1055, 26768), (1195, 23632), (1477, 19120), (1673, 16880), (1688, 16730), (1912, 14770), (2110, 13384), (2390, 11816), (2954, 9560), (3346, 8440), (3376, 8365), (3824, 7385), (4220, 6692), (4780, 5908)]