81122440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{41389}}^1$

素因数の和:41414

約数の個数: 48

約数和(自身を含む): 212330700

約数和(自身を除く): 131208260

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 41389, 82778, 165556, 206945, 289723, 331112, 413890, 579446, 827780, 1158892, 1448615, 1655560, 2028061, 2317784, 2897230, 4056122, 5794460, 8112244, 10140305, 11588920, 16224488, 20280610, 40561220, 81122440]

約数ペア:

[(1, 81122440), (2, 40561220), (4, 20280610), (5, 16224488), (7, 11588920), (8, 10140305), (10, 8112244), (14, 5794460), (20, 4056122), (28, 2897230), (35, 2317784), (40, 2028061), (49, 1655560), (56, 1448615), (70, 1158892), (98, 827780), (140, 579446), (196, 413890), (245, 331112), (280, 289723), (392, 206945), (490, 165556), (980, 82778), (1960, 41389)]