644647900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{6277}}^1$

素因数の和:6383

約数の個数: 72

約数和(自身を含む): 1525805120

約数和(自身を除く): 881157220

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 79, 100, 130, 158, 260, 316, 325, 395, 650, 790, 1027, 1300, 1580, 1975, 2054, 3950, 4108, 5135, 6277, 7900, 10270, 12554, 20540, 25108, 25675, 31385, 51350, 62770, 81601, 102700, 125540, 156925, 163202, 313850, 326404, 408005, 495883, 627700, 816010, 991766, 1632020, 1983532, 2040025, 2479415, 4080050, 4958830, 6446479, 8160100, 9917660, 12397075, 12892958, 24794150, 25785916, 32232395, 49588300, 64464790, 128929580, 161161975, 322323950, 644647900]

約数ペア:

[(1, 644647900), (2, 322323950), (4, 161161975), (5, 128929580), (10, 64464790), (13, 49588300), (20, 32232395), (25, 25785916), (26, 24794150), (50, 12892958), (52, 12397075), (65, 9917660), (79, 8160100), (100, 6446479), (130, 4958830), (158, 4080050), (260, 2479415), (316, 2040025), (325, 1983532), (395, 1632020), (650, 991766), (790, 816010), (1027, 627700), (1300, 495883), (1580, 408005), (1975, 326404), (2054, 313850), (3950, 163202), (4108, 156925), (5135, 125540), (6277, 102700), (7900, 81601), (10270, 62770), (12554, 51350), (20540, 31385), (25108, 25675)]