21308475

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 37185120

約数和(自身を除く): 15876645

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 97, 101, 145, 291, 303, 435, 485, 505, 725, 1455, 1515, 2175, 2425, 2525, 2813, 2929, 7275, 7575, 8439, 8787, 9797, 14065, 14645, 29391, 42195, 43935, 48985, 70325, 73225, 146955, 210975, 219675, 244925, 284113, 734775, 852339, 1420565, 4261695, 7102825, 21308475]

約数ペア:

[(1, 21308475), (3, 7102825), (5, 4261695), (15, 1420565), (25, 852339), (29, 734775), (75, 284113), (87, 244925), (97, 219675), (101, 210975), (145, 146955), (291, 73225), (303, 70325), (435, 48985), (485, 43935), (505, 42195), (725, 29391), (1455, 14645), (1515, 14065), (2175, 9797), (2425, 8787), (2525, 8439), (2813, 7575), (2929, 7275)]