21516835

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 28569600

約数和(自身を除く): 7052765

約数列:

[1, 5, 19, 47, 61, 79, 95, 235, 305, 395, 893, 1159, 1501, 2867, 3713, 4465, 4819, 5795, 7505, 14335, 18565, 24095, 54473, 70547, 91561, 226493, 272365, 352735, 457805, 1132465, 4303367, 21516835]

約数ペア:

[(1, 21516835), (5, 4303367), (19, 1132465), (47, 457805), (61, 352735), (79, 272365), (95, 226493), (235, 91561), (305, 70547), (395, 54473), (893, 24095), (1159, 18565), (1501, 14335), (2867, 7505), (3713, 5795), (4465, 4819)]