138273940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{2539}}^1$

素因数の和:2944

約数の個数: 48

約数和(自身を含む): 332841600

約数和(自身を除く): 194567660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 389, 778, 1556, 1945, 2539, 2723, 3890, 5078, 5446, 7780, 10156, 10892, 12695, 13615, 17773, 25390, 27230, 35546, 50780, 54460, 71092, 88865, 177730, 355460, 987671, 1975342, 3950684, 4938355, 6913697, 9876710, 13827394, 19753420, 27654788, 34568485, 69136970, 138273940]

約数ペア:

[(1, 138273940), (2, 69136970), (4, 34568485), (5, 27654788), (7, 19753420), (10, 13827394), (14, 9876710), (20, 6913697), (28, 4938355), (35, 3950684), (70, 1975342), (140, 987671), (389, 355460), (778, 177730), (1556, 88865), (1945, 71092), (2539, 54460), (2723, 50780), (3890, 35546), (5078, 27230), (5446, 25390), (7780, 17773), (10156, 13615), (10892, 12695)]