21616965

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 39948480

約数和(自身を除く): 18331515

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 131, 171, 193, 285, 393, 579, 655, 855, 965, 1179, 1737, 1965, 2489, 2895, 3667, 5895, 7467, 8685, 11001, 12445, 18335, 22401, 25283, 33003, 37335, 55005, 75849, 112005, 126415, 165015, 227547, 379245, 480377, 1137735, 1441131, 2401885, 4323393, 7205655, 21616965]

約数ペア:

[(1, 21616965), (3, 7205655), (5, 4323393), (9, 2401885), (15, 1441131), (19, 1137735), (45, 480377), (57, 379245), (95, 227547), (131, 165015), (171, 126415), (193, 112005), (285, 75849), (393, 55005), (579, 37335), (655, 33003), (855, 25283), (965, 22401), (1179, 18335), (1737, 12445), (1965, 11001), (2489, 8685), (2895, 7467), (3667, 5895)]