20777440

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:176

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 31477280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 59, 62, 71, 80, 118, 124, 142, 155, 160, 236, 248, 284, 295, 310, 355, 472, 496, 568, 590, 620, 710, 944, 992, 1136, 1180, 1240, 1420, 1829, 1888, 2201, 2272, 2360, 2480, 2840, 3658, 4189, 4402, 4720, 4960, 5680, 7316, 8378, 8804, 9145, 9440, 11005, 11360, 14632, 16756, 17608, 18290, 20945, 22010, 29264, 33512, 35216, 36580, 41890, 44020, 58528, 67024, 70432, 73160, 83780, 88040, 129859, 134048, 146320, 167560, 176080, 259718, 292640, 335120, 352160, 519436, 649295, 670240, 1038872, 1298590, 2077744, 2597180, 4155488, 5194360, 10388720, 20777440]

約数ペア:

[(1, 20777440), (2, 10388720), (4, 5194360), (5, 4155488), (8, 2597180), (10, 2077744), (16, 1298590), (20, 1038872), (31, 670240), (32, 649295), (40, 519436), (59, 352160), (62, 335120), (71, 292640), (80, 259718), (118, 176080), (124, 167560), (142, 146320), (155, 134048), (160, 129859), (236, 88040), (248, 83780), (284, 73160), (295, 70432), (310, 67024), (355, 58528), (472, 44020), (496, 41890), (568, 36580), (590, 35216), (620, 33512), (710, 29264), (944, 22010), (992, 20945), (1136, 18290), (1180, 17608), (1240, 16756), (1420, 14632), (1829, 11360), (1888, 11005), (2201, 9440), (2272, 9145), (2360, 8804), (2480, 8378), (2840, 7316), (3658, 5680), (4189, 4960), (4402, 4720)]