18867940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1481}}^1$

素因数の和:1517

約数の個数: 72

約数和(自身を含む): 49670712

約数和(自身を除く): 30802772

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1481, 1820, 2548, 2962, 3185, 5924, 6370, 7405, 10367, 12740, 14810, 19253, 20734, 29620, 38506, 41468, 51835, 72569, 77012, 96265, 103670, 134771, 145138, 192530, 207340, 269542, 290276, 362845, 385060, 539084, 673855, 725690, 943397, 1347710, 1451380, 1886794, 2695420, 3773588, 4716985, 9433970, 18867940]

約数ペア:

[(1, 18867940), (2, 9433970), (4, 4716985), (5, 3773588), (7, 2695420), (10, 1886794), (13, 1451380), (14, 1347710), (20, 943397), (26, 725690), (28, 673855), (35, 539084), (49, 385060), (52, 362845), (65, 290276), (70, 269542), (91, 207340), (98, 192530), (130, 145138), (140, 134771), (182, 103670), (196, 96265), (245, 77012), (260, 72569), (364, 51835), (455, 41468), (490, 38506), (637, 29620), (910, 20734), (980, 19253), (1274, 14810), (1481, 12740), (1820, 10367), (2548, 7405), (2962, 6370), (3185, 5924)]