257202820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{13217}}^1$

素因数の和:13372

約数の個数: 48

約数和(自身を含む): 621774720

約数和(自身を除く): 364571900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1390, 1946, 2780, 3892, 4865, 9730, 13217, 19460, 26434, 52868, 66085, 92519, 132170, 185038, 264340, 370076, 462595, 925190, 1837163, 1850380, 3674326, 7348652, 9185815, 12860141, 18371630, 25720282, 36743260, 51440564, 64300705, 128601410, 257202820]

約数ペア:

[(1, 257202820), (2, 128601410), (4, 64300705), (5, 51440564), (7, 36743260), (10, 25720282), (14, 18371630), (20, 12860141), (28, 9185815), (35, 7348652), (70, 3674326), (139, 1850380), (140, 1837163), (278, 925190), (556, 462595), (695, 370076), (973, 264340), (1390, 185038), (1946, 132170), (2780, 92519), (3892, 66085), (4865, 52868), (9730, 26434), (13217, 19460)]