16820475

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:249

約数の個数: 72

約数和(自身を含む): 33926400

約数和(自身を除く): 17105925

約数列:

[1, 3, 5, 7, 15, 21, 23, 25, 35, 49, 69, 75, 105, 115, 147, 161, 175, 199, 245, 345, 483, 525, 575, 597, 735, 805, 995, 1127, 1225, 1393, 1725, 2415, 2985, 3381, 3675, 4025, 4179, 4577, 4975, 5635, 6965, 9751, 12075, 13731, 14925, 16905, 20895, 22885, 28175, 29253, 32039, 34825, 48755, 68655, 84525, 96117, 104475, 114425, 146265, 160195, 224273, 243775, 343275, 480585, 672819, 731325, 800975, 1121365, 2402925, 3364095, 5606825, 16820475]

約数ペア:

[(1, 16820475), (3, 5606825), (5, 3364095), (7, 2402925), (15, 1121365), (21, 800975), (23, 731325), (25, 672819), (35, 480585), (49, 343275), (69, 243775), (75, 224273), (105, 160195), (115, 146265), (147, 114425), (161, 104475), (175, 96117), (199, 84525), (245, 68655), (345, 48755), (483, 34825), (525, 32039), (575, 29253), (597, 28175), (735, 22885), (805, 20895), (995, 16905), (1127, 14925), (1225, 13731), (1393, 12075), (1725, 9751), (2415, 6965), (2985, 5635), (3381, 4975), (3675, 4577), (4025, 4179)]