21218535

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 44029440

約数和(自身を除く): 22810905

約数列:

[1, 3, 5, 9, 13, 15, 19, 23, 39, 45, 57, 65, 69, 83, 95, 115, 117, 171, 195, 207, 247, 249, 285, 299, 345, 415, 437, 585, 741, 747, 855, 897, 1035, 1079, 1235, 1245, 1311, 1495, 1577, 1909, 2185, 2223, 2691, 3237, 3705, 3735, 3933, 4485, 4731, 5395, 5681, 5727, 6555, 7885, 9545, 9711, 11115, 13455, 14193, 16185, 17043, 17181, 19665, 20501, 23655, 24817, 28405, 28635, 36271, 48555, 51129, 61503, 70965, 74451, 85215, 85905, 102505, 108813, 124085, 181355, 184509, 223353, 255645, 307515, 326439, 372255, 471523, 544065, 922545, 1116765, 1414569, 1632195, 2357615, 4243707, 7072845, 21218535]

約数ペア:

[(1, 21218535), (3, 7072845), (5, 4243707), (9, 2357615), (13, 1632195), (15, 1414569), (19, 1116765), (23, 922545), (39, 544065), (45, 471523), (57, 372255), (65, 326439), (69, 307515), (83, 255645), (95, 223353), (115, 184509), (117, 181355), (171, 124085), (195, 108813), (207, 102505), (247, 85905), (249, 85215), (285, 74451), (299, 70965), (345, 61503), (415, 51129), (437, 48555), (585, 36271), (741, 28635), (747, 28405), (855, 24817), (897, 23655), (1035, 20501), (1079, 19665), (1235, 17181), (1245, 17043), (1311, 16185), (1495, 14193), (1577, 13455), (1909, 11115), (2185, 9711), (2223, 9545), (2691, 7885), (3237, 6555), (3705, 5727), (3735, 5681), (3933, 5395), (4485, 4731)]