21119917

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6458963

約数列:

[1, 7, 13, 29, 53, 91, 151, 203, 371, 377, 689, 1057, 1537, 1963, 2639, 4379, 4823, 8003, 10759, 13741, 19981, 30653, 56021, 56927, 104039, 139867, 232087, 398489, 728273, 1624609, 3017131, 21119917]

約数ペア:

[(1, 21119917), (7, 3017131), (13, 1624609), (29, 728273), (53, 398489), (91, 232087), (151, 139867), (203, 104039), (371, 56927), (377, 56021), (689, 30653), (1057, 19981), (1537, 13741), (1963, 10759), (2639, 8003), (4379, 4823)]