826639540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{6421}}^1$

素因数の和:6628

約数の個数: 48

約数和(自身を含む): 1789888464

約数和(自身を除く): 963248924

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 157, 164, 205, 314, 410, 628, 785, 820, 1570, 3140, 6421, 6437, 12842, 12874, 25684, 25748, 32105, 32185, 64210, 64370, 128420, 128740, 263261, 526522, 1008097, 1053044, 1316305, 2016194, 2632610, 4032388, 5040485, 5265220, 10080970, 20161940, 41331977, 82663954, 165327908, 206659885, 413319770, 826639540]

約数ペア:

[(1, 826639540), (2, 413319770), (4, 206659885), (5, 165327908), (10, 82663954), (20, 41331977), (41, 20161940), (82, 10080970), (157, 5265220), (164, 5040485), (205, 4032388), (314, 2632610), (410, 2016194), (628, 1316305), (785, 1053044), (820, 1008097), (1570, 526522), (3140, 263261), (6421, 128740), (6437, 128420), (12842, 64370), (12874, 64210), (25684, 32185), (25748, 32105)]