278977465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{977}}^1$

素因数の和:1209

約数の個数: 32

約数和(自身を含む): 378556416

約数和(自身を除く): 99578951

約数列:

[1, 5, 13, 23, 65, 115, 191, 299, 955, 977, 1495, 2483, 4393, 4885, 12415, 12701, 21965, 22471, 57109, 63505, 112355, 186607, 285545, 292123, 933035, 1460615, 2425891, 4291961, 12129455, 21459805, 55795493, 278977465]

約数ペア:

[(1, 278977465), (5, 55795493), (13, 21459805), (23, 12129455), (65, 4291961), (115, 2425891), (191, 1460615), (299, 933035), (955, 292123), (977, 285545), (1495, 186607), (2483, 112355), (4393, 63505), (4885, 57109), (12415, 22471), (12701, 21965)]