20519910

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{431}}^1$

素因数の和:490

約数の個数: 72

約数和(自身を含む): 55901664

約数和(自身を除く): 35381754

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 30, 45, 46, 69, 90, 115, 138, 207, 230, 345, 414, 431, 529, 690, 862, 1035, 1058, 1293, 1587, 2070, 2155, 2586, 2645, 3174, 3879, 4310, 4761, 5290, 6465, 7758, 7935, 9522, 9913, 12930, 15870, 19395, 19826, 23805, 29739, 38790, 47610, 49565, 59478, 89217, 99130, 148695, 178434, 227999, 297390, 446085, 455998, 683997, 892170, 1139995, 1367994, 2051991, 2279990, 3419985, 4103982, 6839970, 10259955, 20519910]

約数ペア:

[(1, 20519910), (2, 10259955), (3, 6839970), (5, 4103982), (6, 3419985), (9, 2279990), (10, 2051991), (15, 1367994), (18, 1139995), (23, 892170), (30, 683997), (45, 455998), (46, 446085), (69, 297390), (90, 227999), (115, 178434), (138, 148695), (207, 99130), (230, 89217), (345, 59478), (414, 49565), (431, 47610), (529, 38790), (690, 29739), (862, 23805), (1035, 19826), (1058, 19395), (1293, 15870), (1587, 12930), (2070, 9913), (2155, 9522), (2586, 7935), (2645, 7758), (3174, 6465), (3879, 5290), (4310, 4761)]