19948160

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:529

約数の個数: 64

約数和(自身を含む): 48470400

約数和(自身を除く): 28522240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 284, 320, 355, 439, 568, 640, 710, 878, 1136, 1420, 1756, 2195, 2272, 2840, 3512, 4390, 4544, 5680, 7024, 8780, 9088, 11360, 14048, 17560, 22720, 28096, 31169, 35120, 45440, 56192, 62338, 70240, 124676, 140480, 155845, 249352, 280960, 311690, 498704, 623380, 997408, 1246760, 1994816, 2493520, 3989632, 4987040, 9974080, 19948160]

約数ペア:

[(1, 19948160), (2, 9974080), (4, 4987040), (5, 3989632), (8, 2493520), (10, 1994816), (16, 1246760), (20, 997408), (32, 623380), (40, 498704), (64, 311690), (71, 280960), (80, 249352), (128, 155845), (142, 140480), (160, 124676), (284, 70240), (320, 62338), (355, 56192), (439, 45440), (568, 35120), (640, 31169), (710, 28096), (878, 22720), (1136, 17560), (1420, 14048), (1756, 11360), (2195, 9088), (2272, 8780), (2840, 7024), (3512, 5680), (4390, 4544)]