16619980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{659}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 38031840

約数和(自身を除く): 21411860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 659, 970, 1261, 1318, 1940, 2522, 2636, 3295, 5044, 6305, 6590, 8567, 12610, 13180, 17134, 25220, 34268, 42835, 63923, 85670, 127846, 171340, 255692, 319615, 639230, 830999, 1278460, 1661998, 3323996, 4154995, 8309990, 16619980]

約数ペア:

[(1, 16619980), (2, 8309990), (4, 4154995), (5, 3323996), (10, 1661998), (13, 1278460), (20, 830999), (26, 639230), (52, 319615), (65, 255692), (97, 171340), (130, 127846), (194, 85670), (260, 63923), (388, 42835), (485, 34268), (659, 25220), (970, 17134), (1261, 13180), (1318, 12610), (1940, 8567), (2522, 6590), (2636, 6305), (3295, 5044)]