217397375

素因数分解:

$5^3\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:333

約数の個数: 48

約数和(自身を含む): 302152032

約数和(自身を除く): 84754657

約数列:

[1, 5, 13, 25, 41, 65, 125, 169, 205, 251, 325, 533, 845, 1025, 1255, 1625, 2665, 3263, 4225, 5125, 6275, 6929, 10291, 13325, 16315, 21125, 31375, 34645, 42419, 51455, 66625, 81575, 133783, 173225, 212095, 257275, 407875, 668915, 866125, 1060475, 1286375, 1739179, 3344575, 5302375, 8695895, 16722875, 43479475, 217397375]

約数ペア:

[(1, 217397375), (5, 43479475), (13, 16722875), (25, 8695895), (41, 5302375), (65, 3344575), (125, 1739179), (169, 1286375), (205, 1060475), (251, 866125), (325, 668915), (533, 407875), (845, 257275), (1025, 212095), (1255, 173225), (1625, 133783), (2665, 81575), (3263, 66625), (4225, 51455), (5125, 42419), (6275, 34645), (6929, 31375), (10291, 21125), (13325, 16315)]