20869020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{431}}^1$

素因数の和:715

約数の個数: 72

約数和(自身を含む): 63685440

約数和(自身を除く): 42816420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 269, 431, 538, 807, 862, 1076, 1293, 1345, 1614, 1724, 2155, 2421, 2586, 2690, 3228, 3879, 4035, 4310, 4842, 5172, 5380, 6465, 7758, 8070, 8620, 9684, 12105, 12930, 15516, 16140, 19395, 24210, 25860, 38790, 48420, 77580, 115939, 231878, 347817, 463756, 579695, 695634, 1043451, 1159390, 1391268, 1739085, 2086902, 2318780, 3478170, 4173804, 5217255, 6956340, 10434510, 20869020]

約数ペア:

[(1, 20869020), (2, 10434510), (3, 6956340), (4, 5217255), (5, 4173804), (6, 3478170), (9, 2318780), (10, 2086902), (12, 1739085), (15, 1391268), (18, 1159390), (20, 1043451), (30, 695634), (36, 579695), (45, 463756), (60, 347817), (90, 231878), (180, 115939), (269, 77580), (431, 48420), (538, 38790), (807, 25860), (862, 24210), (1076, 19395), (1293, 16140), (1345, 15516), (1614, 12930), (1724, 12105), (2155, 9684), (2421, 8620), (2586, 8070), (2690, 7758), (3228, 6465), (3879, 5380), (4035, 5172), (4310, 4842)]