51405440

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2591}}^1$

素因数の和:2641

約数の個数: 64

約数和(自身を含む): 126904320

約数和(自身を除く): 75498880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 2591, 3968, 4960, 5182, 9920, 10364, 12955, 19840, 20728, 25910, 41456, 51820, 80321, 82912, 103640, 160642, 165824, 207280, 321284, 331648, 401605, 414560, 642568, 803210, 829120, 1285136, 1606420, 1658240, 2570272, 3212840, 5140544, 6425680, 10281088, 12851360, 25702720, 51405440]

約数ペア:

[(1, 51405440), (2, 25702720), (4, 12851360), (5, 10281088), (8, 6425680), (10, 5140544), (16, 3212840), (20, 2570272), (31, 1658240), (32, 1606420), (40, 1285136), (62, 829120), (64, 803210), (80, 642568), (124, 414560), (128, 401605), (155, 331648), (160, 321284), (248, 207280), (310, 165824), (320, 160642), (496, 103640), (620, 82912), (640, 80321), (992, 51820), (1240, 41456), (1984, 25910), (2480, 20728), (2591, 19840), (3968, 12955), (4960, 10364), (5182, 9920)]