215312980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{269}}^1\times {\mathrm{1291}}^1$

素因数の和:1600

約数の個数: 48

約数和(自身を含む): 468840960

約数和(自身を除く): 253527980

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 269, 310, 538, 620, 1076, 1291, 1345, 2582, 2690, 5164, 5380, 6455, 8339, 12910, 16678, 25820, 33356, 40021, 41695, 80042, 83390, 160084, 166780, 200105, 347279, 400210, 694558, 800420, 1389116, 1736395, 3472790, 6945580, 10765649, 21531298, 43062596, 53828245, 107656490, 215312980]

約数ペア:

[(1, 215312980), (2, 107656490), (4, 53828245), (5, 43062596), (10, 21531298), (20, 10765649), (31, 6945580), (62, 3472790), (124, 1736395), (155, 1389116), (269, 800420), (310, 694558), (538, 400210), (620, 347279), (1076, 200105), (1291, 166780), (1345, 160084), (2582, 83390), (2690, 80042), (5164, 41695), (5380, 40021), (6455, 33356), (8339, 25820), (12910, 16678)]