20078720

素因数分解:

$2^7\times 5^1\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:385

約数の個数: 64

約数和(自身を含む): 48562200

約数和(自身を除く): 28483480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 137, 160, 229, 274, 320, 458, 548, 640, 685, 916, 1096, 1145, 1370, 1832, 2192, 2290, 2740, 3664, 4384, 4580, 5480, 7328, 8768, 9160, 10960, 14656, 17536, 18320, 21920, 29312, 31373, 36640, 43840, 62746, 73280, 87680, 125492, 146560, 156865, 250984, 313730, 501968, 627460, 1003936, 1254920, 2007872, 2509840, 4015744, 5019680, 10039360, 20078720]

約数ペア:

[(1, 20078720), (2, 10039360), (4, 5019680), (5, 4015744), (8, 2509840), (10, 2007872), (16, 1254920), (20, 1003936), (32, 627460), (40, 501968), (64, 313730), (80, 250984), (128, 156865), (137, 146560), (160, 125492), (229, 87680), (274, 73280), (320, 62746), (458, 43840), (548, 36640), (640, 31373), (685, 29312), (916, 21920), (1096, 18320), (1145, 17536), (1370, 14656), (1832, 10960), (2192, 9160), (2290, 8768), (2740, 7328), (3664, 5480), (4384, 4580)]