28909100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{641}}^1$

素因数の和:707

約数の個数: 72

約数和(自身を含む): 70214256

約数和(自身を除く): 41305156

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 164, 205, 220, 275, 410, 451, 550, 641, 820, 902, 1025, 1100, 1282, 1804, 2050, 2255, 2564, 3205, 4100, 4510, 6410, 7051, 9020, 11275, 12820, 14102, 16025, 22550, 26281, 28204, 32050, 35255, 45100, 52562, 64100, 70510, 105124, 131405, 141020, 176275, 262810, 289091, 352550, 525620, 578182, 657025, 705100, 1156364, 1314050, 1445455, 2628100, 2890910, 5781820, 7227275, 14454550, 28909100]

約数ペア:

[(1, 28909100), (2, 14454550), (4, 7227275), (5, 5781820), (10, 2890910), (11, 2628100), (20, 1445455), (22, 1314050), (25, 1156364), (41, 705100), (44, 657025), (50, 578182), (55, 525620), (82, 352550), (100, 289091), (110, 262810), (164, 176275), (205, 141020), (220, 131405), (275, 105124), (410, 70510), (451, 64100), (550, 52562), (641, 45100), (820, 35255), (902, 32050), (1025, 28204), (1100, 26281), (1282, 22550), (1804, 16025), (2050, 14102), (2255, 12820), (2564, 11275), (3205, 9020), (4100, 7051), (4510, 6410)]