421480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{257}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 975240

約数和(自身を除く): 553760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 257, 328, 410, 514, 820, 1028, 1285, 1640, 2056, 2570, 5140, 10280, 10537, 21074, 42148, 52685, 84296, 105370, 210740, 421480]

約数ペア:

[(1, 421480), (2, 210740), (4, 105370), (5, 84296), (8, 52685), (10, 42148), (20, 21074), (40, 10537), (41, 10280), (82, 5140), (164, 2570), (205, 2056), (257, 1640), (328, 1285), (410, 1028), (514, 820)]