21409000

素因数分解:

$2^3\times 5^3\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:371

約数の個数: 64

約数和(自身を含む): 50918400

約数和(自身を除く): 29509400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 125, 158, 200, 250, 271, 316, 395, 500, 542, 632, 790, 1000, 1084, 1355, 1580, 1975, 2168, 2710, 3160, 3950, 5420, 6775, 7900, 9875, 10840, 13550, 15800, 19750, 21409, 27100, 33875, 39500, 42818, 54200, 67750, 79000, 85636, 107045, 135500, 171272, 214090, 271000, 428180, 535225, 856360, 1070450, 2140900, 2676125, 4281800, 5352250, 10704500, 21409000]

約数ペア:

[(1, 21409000), (2, 10704500), (4, 5352250), (5, 4281800), (8, 2676125), (10, 2140900), (20, 1070450), (25, 856360), (40, 535225), (50, 428180), (79, 271000), (100, 214090), (125, 171272), (158, 135500), (200, 107045), (250, 85636), (271, 79000), (316, 67750), (395, 54200), (500, 42818), (542, 39500), (632, 33875), (790, 27100), (1000, 21409), (1084, 19750), (1355, 15800), (1580, 13550), (1975, 10840), (2168, 9875), (2710, 7900), (3160, 6775), (3950, 5420)]