21029800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^3\times {\mathrm{79}}^1$

素因数の和:128

約数の個数: 96

約数和(自身を含む): 54460800

約数和(自身を除く): 33431000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 79, 88, 100, 110, 121, 158, 200, 220, 242, 275, 316, 395, 440, 484, 550, 605, 632, 790, 869, 968, 1100, 1210, 1331, 1580, 1738, 1975, 2200, 2420, 2662, 3025, 3160, 3476, 3950, 4345, 4840, 5324, 6050, 6655, 6952, 7900, 8690, 9559, 10648, 12100, 13310, 15800, 17380, 19118, 21725, 24200, 26620, 33275, 34760, 38236, 43450, 47795, 53240, 66550, 76472, 86900, 95590, 105149, 133100, 173800, 191180, 210298, 238975, 266200, 382360, 420596, 477950, 525745, 841192, 955900, 1051490, 1911800, 2102980, 2628725, 4205960, 5257450, 10514900, 21029800]

約数ペア:

[(1, 21029800), (2, 10514900), (4, 5257450), (5, 4205960), (8, 2628725), (10, 2102980), (11, 1911800), (20, 1051490), (22, 955900), (25, 841192), (40, 525745), (44, 477950), (50, 420596), (55, 382360), (79, 266200), (88, 238975), (100, 210298), (110, 191180), (121, 173800), (158, 133100), (200, 105149), (220, 95590), (242, 86900), (275, 76472), (316, 66550), (395, 53240), (440, 47795), (484, 43450), (550, 38236), (605, 34760), (632, 33275), (790, 26620), (869, 24200), (968, 21725), (1100, 19118), (1210, 17380), (1331, 15800), (1580, 13310), (1738, 12100), (1975, 10648), (2200, 9559), (2420, 8690), (2662, 7900), (3025, 6952), (3160, 6655), (3476, 6050), (3950, 5324), (4345, 4840)]