28975940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1489}}^1$

素因数の和:1644

約数の個数: 48

約数和(自身を含む): 70089600

約数和(自身を除く): 41113660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1390, 1489, 1946, 2780, 2978, 3892, 4865, 5956, 7445, 9730, 10423, 14890, 19460, 20846, 29780, 41692, 52115, 104230, 206971, 208460, 413942, 827884, 1034855, 1448797, 2069710, 2897594, 4139420, 5795188, 7243985, 14487970, 28975940]

約数ペア:

[(1, 28975940), (2, 14487970), (4, 7243985), (5, 5795188), (7, 4139420), (10, 2897594), (14, 2069710), (20, 1448797), (28, 1034855), (35, 827884), (70, 413942), (139, 208460), (140, 206971), (278, 104230), (556, 52115), (695, 41692), (973, 29780), (1390, 20846), (1489, 19460), (1946, 14890), (2780, 10423), (2978, 9730), (3892, 7445), (4865, 5956)]