28213720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{373}}^1$

素因数の和:476

約数の個数: 64

約数和(自身を含む): 66781440

約数和(自身を除く): 38567720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 244, 248, 305, 310, 373, 488, 610, 620, 746, 1220, 1240, 1492, 1865, 1891, 2440, 2984, 3730, 3782, 7460, 7564, 9455, 11563, 14920, 15128, 18910, 22753, 23126, 37820, 45506, 46252, 57815, 75640, 91012, 92504, 113765, 115630, 182024, 227530, 231260, 455060, 462520, 705343, 910120, 1410686, 2821372, 3526715, 5642744, 7053430, 14106860, 28213720]

約数ペア:

[(1, 28213720), (2, 14106860), (4, 7053430), (5, 5642744), (8, 3526715), (10, 2821372), (20, 1410686), (31, 910120), (40, 705343), (61, 462520), (62, 455060), (122, 231260), (124, 227530), (155, 182024), (244, 115630), (248, 113765), (305, 92504), (310, 91012), (373, 75640), (488, 57815), (610, 46252), (620, 45506), (746, 37820), (1220, 23126), (1240, 22753), (1492, 18910), (1865, 15128), (1891, 14920), (2440, 11563), (2984, 9455), (3730, 7564), (3782, 7460)]