81303880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2089}}^1$

素因数の和:2246

約数の個数: 64

約数和(自身を含む): 210672000

約数和(自身を除く): 129368120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 695, 973, 1112, 1390, 1946, 2089, 2780, 3892, 4178, 4865, 5560, 7784, 8356, 9730, 10445, 14623, 16712, 19460, 20890, 29246, 38920, 41780, 58492, 73115, 83560, 116984, 146230, 290371, 292460, 580742, 584920, 1161484, 1451855, 2032597, 2322968, 2903710, 4065194, 5807420, 8130388, 10162985, 11614840, 16260776, 20325970, 40651940, 81303880]

約数ペア:

[(1, 81303880), (2, 40651940), (4, 20325970), (5, 16260776), (7, 11614840), (8, 10162985), (10, 8130388), (14, 5807420), (20, 4065194), (28, 2903710), (35, 2322968), (40, 2032597), (56, 1451855), (70, 1161484), (139, 584920), (140, 580742), (278, 292460), (280, 290371), (556, 146230), (695, 116984), (973, 83560), (1112, 73115), (1390, 58492), (1946, 41780), (2089, 38920), (2780, 29246), (3892, 20890), (4178, 19460), (4865, 16712), (5560, 14623), (7784, 10445), (8356, 9730)]