21642340

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{521}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 47706624

約数和(自身を除く): 26064284

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 155, 268, 310, 335, 521, 620, 670, 1042, 1340, 2077, 2084, 2605, 4154, 5210, 8308, 10385, 10420, 16151, 20770, 32302, 34907, 41540, 64604, 69814, 80755, 139628, 161510, 174535, 323020, 349070, 698140, 1082117, 2164234, 4328468, 5410585, 10821170, 21642340]

約数ペア:

[(1, 21642340), (2, 10821170), (4, 5410585), (5, 4328468), (10, 2164234), (20, 1082117), (31, 698140), (62, 349070), (67, 323020), (124, 174535), (134, 161510), (155, 139628), (268, 80755), (310, 69814), (335, 64604), (521, 41540), (620, 34907), (670, 32302), (1042, 20770), (1340, 16151), (2077, 10420), (2084, 10385), (2605, 8308), (4154, 5210)]