21803915

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 31190400

約数和(自身を除く): 9386485

約数列:

[1, 5, 7, 35, 37, 113, 149, 185, 259, 565, 745, 791, 1043, 1295, 3955, 4181, 5215, 5513, 16837, 20905, 27565, 29267, 38591, 84185, 117859, 146335, 192955, 589295, 622969, 3114845, 4360783, 21803915]

約数ペア:

[(1, 21803915), (5, 4360783), (7, 3114845), (35, 622969), (37, 589295), (113, 192955), (149, 146335), (185, 117859), (259, 84185), (565, 38591), (745, 29267), (791, 27565), (1043, 20905), (1295, 16837), (3955, 5513), (4181, 5215)]