20479840

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4129}}^1$

素因数の和:4175

約数の個数: 48

約数和(自身を含む): 49956480

約数和(自身を除く): 29476640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4129, 4960, 8258, 16516, 20645, 33032, 41290, 66064, 82580, 127999, 132128, 165160, 255998, 330320, 511996, 639995, 660640, 1023992, 1279990, 2047984, 2559980, 4095968, 5119960, 10239920, 20479840]

約数ペア:

[(1, 20479840), (2, 10239920), (4, 5119960), (5, 4095968), (8, 2559980), (10, 2047984), (16, 1279990), (20, 1023992), (31, 660640), (32, 639995), (40, 511996), (62, 330320), (80, 255998), (124, 165160), (155, 132128), (160, 127999), (248, 82580), (310, 66064), (496, 41290), (620, 33032), (992, 20645), (1240, 16516), (2480, 8258), (4129, 4960)]