21230820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:282

約数の個数: 144

約数和(自身を含む): 71303232

約数和(自身を除く): 50072412

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 43, 45, 52, 60, 65, 78, 86, 90, 117, 129, 130, 156, 172, 180, 195, 211, 215, 234, 258, 260, 387, 390, 422, 430, 468, 516, 559, 585, 633, 645, 774, 780, 844, 860, 1055, 1118, 1170, 1266, 1290, 1548, 1677, 1899, 1935, 2110, 2236, 2340, 2532, 2580, 2743, 2795, 3165, 3354, 3798, 3870, 4220, 5031, 5486, 5590, 6330, 6708, 7596, 7740, 8229, 8385, 9073, 9495, 10062, 10972, 11180, 12660, 13715, 16458, 16770, 18146, 18990, 20124, 24687, 25155, 27219, 27430, 32916, 33540, 36292, 37980, 41145, 45365, 49374, 50310, 54438, 54860, 81657, 82290, 90730, 98748, 100620, 108876, 117949, 123435, 136095, 163314, 164580, 181460, 235898, 246870, 272190, 326628, 353847, 408285, 471796, 493740, 544380, 589745, 707694, 816570, 1061541, 1179490, 1415388, 1633140, 1769235, 2123082, 2358980, 3538470, 4246164, 5307705, 7076940, 10615410, 21230820]

約数ペア:

[(1, 21230820), (2, 10615410), (3, 7076940), (4, 5307705), (5, 4246164), (6, 3538470), (9, 2358980), (10, 2123082), (12, 1769235), (13, 1633140), (15, 1415388), (18, 1179490), (20, 1061541), (26, 816570), (30, 707694), (36, 589745), (39, 544380), (43, 493740), (45, 471796), (52, 408285), (60, 353847), (65, 326628), (78, 272190), (86, 246870), (90, 235898), (117, 181460), (129, 164580), (130, 163314), (156, 136095), (172, 123435), (180, 117949), (195, 108876), (211, 100620), (215, 98748), (234, 90730), (258, 82290), (260, 81657), (387, 54860), (390, 54438), (422, 50310), (430, 49374), (468, 45365), (516, 41145), (559, 37980), (585, 36292), (633, 33540), (645, 32916), (774, 27430), (780, 27219), (844, 25155), (860, 24687), (1055, 20124), (1118, 18990), (1170, 18146), (1266, 16770), (1290, 16458), (1548, 13715), (1677, 12660), (1899, 11180), (1935, 10972), (2110, 10062), (2236, 9495), (2340, 9073), (2532, 8385), (2580, 8229), (2743, 7740), (2795, 7596), (3165, 6708), (3354, 6330), (3798, 5590), (3870, 5486), (4220, 5031)]