21729120520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31954589}}^1$

素因数の和:31954617

約数の個数: 32

約数和(自身を含む): 51766435800

約数和(自身を除く): 30037315280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31954589, 63909178, 127818356, 159772945, 255636712, 319545890, 543228013, 639091780, 1086456026, 1278183560, 2172912052, 2716140065, 4345824104, 5432280130, 10864560260, 21729120520]

約数ペア:

[(1, 21729120520), (2, 10864560260), (4, 5432280130), (5, 4345824104), (8, 2716140065), (10, 2172912052), (17, 1278183560), (20, 1086456026), (34, 639091780), (40, 543228013), (68, 319545890), (85, 255636712), (136, 159772945), (170, 127818356), (340, 63909178), (680, 31954589)]