19954740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25583}}^1$

素因数の和:25608

約数の個数: 48

約数和(自身を含む): 60173568

約数和(自身を除く): 40218828

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25583, 51166, 76749, 102332, 127915, 153498, 255830, 306996, 332579, 383745, 511660, 665158, 767490, 997737, 1330316, 1534980, 1662895, 1995474, 3325790, 3990948, 4988685, 6651580, 9977370, 19954740]

約数ペア:

[(1, 19954740), (2, 9977370), (3, 6651580), (4, 4988685), (5, 3990948), (6, 3325790), (10, 1995474), (12, 1662895), (13, 1534980), (15, 1330316), (20, 997737), (26, 767490), (30, 665158), (39, 511660), (52, 383745), (60, 332579), (65, 306996), (78, 255830), (130, 153498), (156, 127915), (195, 102332), (260, 76749), (390, 51166), (780, 25583)]