21454480

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:296

約数の個数: 80

約数和(自身を含む): 52996608

約数和(自身を除く): 31542128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 41, 62, 80, 82, 124, 155, 164, 205, 211, 248, 310, 328, 410, 422, 496, 620, 656, 820, 844, 1055, 1240, 1271, 1640, 1688, 2110, 2480, 2542, 3280, 3376, 4220, 5084, 6355, 6541, 8440, 8651, 10168, 12710, 13082, 16880, 17302, 20336, 25420, 26164, 32705, 34604, 43255, 50840, 52328, 65410, 69208, 86510, 101680, 104656, 130820, 138416, 173020, 261640, 268181, 346040, 523280, 536362, 692080, 1072724, 1340905, 2145448, 2681810, 4290896, 5363620, 10727240, 21454480]

約数ペア:

[(1, 21454480), (2, 10727240), (4, 5363620), (5, 4290896), (8, 2681810), (10, 2145448), (16, 1340905), (20, 1072724), (31, 692080), (40, 536362), (41, 523280), (62, 346040), (80, 268181), (82, 261640), (124, 173020), (155, 138416), (164, 130820), (205, 104656), (211, 101680), (248, 86510), (310, 69208), (328, 65410), (410, 52328), (422, 50840), (496, 43255), (620, 34604), (656, 32705), (820, 26164), (844, 25420), (1055, 20336), (1240, 17302), (1271, 16880), (1640, 13082), (1688, 12710), (2110, 10168), (2480, 8651), (2542, 8440), (3280, 6541), (3376, 6355), (4220, 5084)]