21998735

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 7999345

約数列:

[1, 5, 11, 55, 61, 79, 83, 305, 395, 415, 671, 869, 913, 3355, 4345, 4565, 4819, 5063, 6557, 24095, 25315, 32785, 53009, 55693, 72127, 265045, 278465, 360635, 399977, 1999885, 4399747, 21998735]

約数ペア:

[(1, 21998735), (5, 4399747), (11, 1999885), (55, 399977), (61, 360635), (79, 278465), (83, 265045), (305, 72127), (395, 55693), (415, 53009), (671, 32785), (869, 25315), (913, 24095), (3355, 6557), (4345, 5063), (4565, 4819)]