18870228

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:745

約数の個数: 72

約数和(自身を含む): 52290056

約数和(自身を除く): 33419828

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 61, 78, 117, 122, 156, 183, 234, 244, 366, 468, 549, 661, 732, 793, 1098, 1322, 1586, 1983, 2196, 2379, 2644, 3172, 3966, 4758, 5949, 7137, 7932, 8593, 9516, 11898, 14274, 17186, 23796, 25779, 28548, 34372, 40321, 51558, 77337, 80642, 103116, 120963, 154674, 161284, 241926, 309348, 362889, 483852, 524173, 725778, 1048346, 1451556, 1572519, 2096692, 3145038, 4717557, 6290076, 9435114, 18870228]

約数ペア:

[(1, 18870228), (2, 9435114), (3, 6290076), (4, 4717557), (6, 3145038), (9, 2096692), (12, 1572519), (13, 1451556), (18, 1048346), (26, 725778), (36, 524173), (39, 483852), (52, 362889), (61, 309348), (78, 241926), (117, 161284), (122, 154674), (156, 120963), (183, 103116), (234, 80642), (244, 77337), (366, 51558), (468, 40321), (549, 34372), (661, 28548), (732, 25779), (793, 23796), (1098, 17186), (1322, 14274), (1586, 11898), (1983, 9516), (2196, 8593), (2379, 7932), (2644, 7137), (3172, 5949), (3966, 4758)]