21457970

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1213}}^1$

素因数の和:1310

約数の個数: 32

約数和(自身を含む): 40644720

約数和(自身を除く): 19186750

約数列:

[1, 2, 5, 10, 29, 58, 61, 122, 145, 290, 305, 610, 1213, 1769, 2426, 3538, 6065, 8845, 12130, 17690, 35177, 70354, 73993, 147986, 175885, 351770, 369965, 739930, 2145797, 4291594, 10728985, 21457970]

約数ペア:

[(1, 21457970), (2, 10728985), (5, 4291594), (10, 2145797), (29, 739930), (58, 369965), (61, 351770), (122, 175885), (145, 147986), (290, 73993), (305, 70354), (610, 35177), (1213, 17690), (1769, 12130), (2426, 8845), (3538, 6065)]