21015800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:225

約数の個数: 96

約数和(自身を含む): 53902800

約数和(自身を除く): 32887000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 59, 65, 100, 104, 118, 130, 137, 200, 236, 260, 274, 295, 325, 472, 520, 548, 590, 650, 685, 767, 1096, 1180, 1300, 1370, 1475, 1534, 1781, 2360, 2600, 2740, 2950, 3068, 3425, 3562, 3835, 5480, 5900, 6136, 6850, 7124, 7670, 8083, 8905, 11800, 13700, 14248, 15340, 16166, 17810, 19175, 27400, 30680, 32332, 35620, 38350, 40415, 44525, 64664, 71240, 76700, 80830, 89050, 105079, 153400, 161660, 178100, 202075, 210158, 323320, 356200, 404150, 420316, 525395, 808300, 840632, 1050790, 1616600, 2101580, 2626975, 4203160, 5253950, 10507900, 21015800]

約数ペア:

[(1, 21015800), (2, 10507900), (4, 5253950), (5, 4203160), (8, 2626975), (10, 2101580), (13, 1616600), (20, 1050790), (25, 840632), (26, 808300), (40, 525395), (50, 420316), (52, 404150), (59, 356200), (65, 323320), (100, 210158), (104, 202075), (118, 178100), (130, 161660), (137, 153400), (200, 105079), (236, 89050), (260, 80830), (274, 76700), (295, 71240), (325, 64664), (472, 44525), (520, 40415), (548, 38350), (590, 35620), (650, 32332), (685, 30680), (767, 27400), (1096, 19175), (1180, 17810), (1300, 16166), (1370, 15340), (1475, 14248), (1534, 13700), (1781, 11800), (2360, 8905), (2600, 8083), (2740, 7670), (2950, 7124), (3068, 6850), (3425, 6136), (3562, 5900), (3835, 5480)]