81820625

素因数分解:

$5^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:195

約数の個数: 40

約数和(自身を含む): 109165056

約数和(自身を除く): 27344431

約数列:

[1, 5, 25, 31, 41, 103, 125, 155, 205, 515, 625, 775, 1025, 1271, 2575, 3193, 3875, 4223, 5125, 6355, 12875, 15965, 19375, 21115, 25625, 31775, 64375, 79825, 105575, 130913, 158875, 399125, 527875, 654565, 794375, 1995625, 2639375, 3272825, 16364125, 81820625]

約数ペア:

[(1, 81820625), (5, 16364125), (25, 3272825), (31, 2639375), (41, 1995625), (103, 794375), (125, 654565), (155, 527875), (205, 399125), (515, 158875), (625, 130913), (775, 105575), (1025, 79825), (1271, 64375), (2575, 31775), (3193, 25625), (3875, 21115), (4223, 19375), (5125, 15965), (6355, 12875)]