315097780

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1\times {\mathrm{401}}^1$

素因数の和:900

約数の個数: 48

約数和(自身を含む): 671645520

約数和(自身を除く): 356547740

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 389, 401, 404, 505, 778, 802, 1010, 1556, 1604, 1945, 2005, 2020, 3890, 4010, 7780, 8020, 39289, 40501, 78578, 81002, 155989, 157156, 162004, 196445, 202505, 311978, 392890, 405010, 623956, 779945, 785780, 810020, 1559890, 3119780, 15754889, 31509778, 63019556, 78774445, 157548890, 315097780]

約数ペア:

[(1, 315097780), (2, 157548890), (4, 78774445), (5, 63019556), (10, 31509778), (20, 15754889), (101, 3119780), (202, 1559890), (389, 810020), (401, 785780), (404, 779945), (505, 623956), (778, 405010), (802, 392890), (1010, 311978), (1556, 202505), (1604, 196445), (1945, 162004), (2005, 157156), (2020, 155989), (3890, 81002), (4010, 78578), (7780, 40501), (8020, 39289)]