20161556180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{458009}}^1$

素因数の和:458120

約数の個数: 48

約数和(自身を含む): 44320711680

約数和(自身を除く): 24159155500

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 620, 710, 1420, 2201, 4402, 8804, 11005, 22010, 44020, 458009, 916018, 1832036, 2290045, 4580090, 9160180, 14198279, 28396558, 32518639, 56793116, 65037278, 70991395, 130074556, 141982790, 162593195, 283965580, 325186390, 650372780, 1008077809, 2016155618, 4032311236, 5040389045, 10080778090, 20161556180]

約数ペア:

[(1, 20161556180), (2, 10080778090), (4, 5040389045), (5, 4032311236), (10, 2016155618), (20, 1008077809), (31, 650372780), (62, 325186390), (71, 283965580), (124, 162593195), (142, 141982790), (155, 130074556), (284, 70991395), (310, 65037278), (355, 56793116), (620, 32518639), (710, 28396558), (1420, 14198279), (2201, 9160180), (4402, 4580090), (8804, 2290045), (11005, 1832036), (22010, 916018), (44020, 458009)]