20919535

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1999}}^1$

素因数の和:2047

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 11336465

約数列:

[1, 5, 7, 13, 23, 35, 65, 91, 115, 161, 299, 455, 805, 1495, 1999, 2093, 9995, 10465, 13993, 25987, 45977, 69965, 129935, 181909, 229885, 321839, 597701, 909545, 1609195, 2988505, 4183907, 20919535]

約数ペア:

[(1, 20919535), (5, 4183907), (7, 2988505), (13, 1609195), (23, 909545), (35, 597701), (65, 321839), (91, 229885), (115, 181909), (161, 129935), (299, 69965), (455, 45977), (805, 25987), (1495, 13993), (1999, 10465), (2093, 9995)]