21760921

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 28804608

約数和(自身を除く): 7043687

約数列:

[1, 7, 13, 23, 37, 91, 161, 259, 281, 299, 481, 851, 1967, 2093, 3367, 3653, 5957, 6463, 10397, 11063, 25571, 45241, 72779, 77441, 84019, 135161, 239131, 588133, 946127, 1673917, 3108703, 21760921]

約数ペア:

[(1, 21760921), (7, 3108703), (13, 1673917), (23, 946127), (37, 588133), (91, 239131), (161, 135161), (259, 84019), (281, 77441), (299, 72779), (481, 45241), (851, 25571), (1967, 11063), (2093, 10397), (3367, 6463), (3653, 5957)]