20157440

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:183

約数の個数: 88

約数和(自身を含む): 50307072

約数和(自身を除く): 30149632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 127, 128, 155, 160, 248, 254, 256, 310, 320, 496, 508, 512, 620, 635, 640, 992, 1016, 1024, 1240, 1270, 1280, 1984, 2032, 2480, 2540, 2560, 3937, 3968, 4064, 4960, 5080, 5120, 7874, 7936, 8128, 9920, 10160, 15748, 15872, 16256, 19685, 19840, 20320, 31496, 31744, 32512, 39370, 39680, 40640, 62992, 65024, 78740, 79360, 81280, 125984, 130048, 157480, 158720, 162560, 251968, 314960, 325120, 503936, 629920, 650240, 1007872, 1259840, 2015744, 2519680, 4031488, 5039360, 10078720, 20157440]

約数ペア:

[(1, 20157440), (2, 10078720), (4, 5039360), (5, 4031488), (8, 2519680), (10, 2015744), (16, 1259840), (20, 1007872), (31, 650240), (32, 629920), (40, 503936), (62, 325120), (64, 314960), (80, 251968), (124, 162560), (127, 158720), (128, 157480), (155, 130048), (160, 125984), (248, 81280), (254, 79360), (256, 78740), (310, 65024), (320, 62992), (496, 40640), (508, 39680), (512, 39370), (620, 32512), (635, 31744), (640, 31496), (992, 20320), (1016, 19840), (1024, 19685), (1240, 16256), (1270, 15872), (1280, 15748), (1984, 10160), (2032, 9920), (2480, 8128), (2540, 7936), (2560, 7874), (3937, 5120), (3968, 5080), (4064, 4960)]