18717020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:363

約数の個数: 72

約数和(自身を含む): 46539360

約数和(自身を除く): 27822340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 269, 284, 355, 490, 497, 538, 710, 980, 994, 1076, 1345, 1420, 1883, 1988, 2485, 2690, 3479, 3766, 4970, 5380, 6958, 7532, 9415, 9940, 13181, 13916, 17395, 18830, 19099, 26362, 34790, 37660, 38198, 52724, 65905, 69580, 76396, 95495, 131810, 133693, 190990, 263620, 267386, 381980, 534772, 668465, 935851, 1336930, 1871702, 2673860, 3743404, 4679255, 9358510, 18717020]

約数ペア:

[(1, 18717020), (2, 9358510), (4, 4679255), (5, 3743404), (7, 2673860), (10, 1871702), (14, 1336930), (20, 935851), (28, 668465), (35, 534772), (49, 381980), (70, 267386), (71, 263620), (98, 190990), (140, 133693), (142, 131810), (196, 95495), (245, 76396), (269, 69580), (284, 65905), (355, 52724), (490, 38198), (497, 37660), (538, 34790), (710, 26362), (980, 19099), (994, 18830), (1076, 17395), (1345, 13916), (1420, 13181), (1883, 9940), (1988, 9415), (2485, 7532), (2690, 6958), (3479, 5380), (3766, 4970)]