19637975

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1$

素因数の和:105

約数の個数: 72

約数和(自身を含む): 32060448

約数和(自身を除く): 12422473

約数列:

[1, 5, 7, 17, 23, 25, 35, 41, 49, 85, 115, 119, 161, 175, 205, 245, 287, 391, 425, 575, 595, 697, 805, 833, 943, 1025, 1127, 1225, 1435, 1955, 2009, 2737, 2975, 3485, 4025, 4165, 4715, 4879, 5635, 6601, 7175, 9775, 10045, 13685, 16031, 17425, 19159, 20825, 23575, 24395, 28175, 33005, 34153, 46207, 50225, 68425, 80155, 95795, 112217, 121975, 165025, 170765, 231035, 400775, 478975, 561085, 785519, 853825, 1155175, 2805425, 3927595, 19637975]

約数ペア:

[(1, 19637975), (5, 3927595), (7, 2805425), (17, 1155175), (23, 853825), (25, 785519), (35, 561085), (41, 478975), (49, 400775), (85, 231035), (115, 170765), (119, 165025), (161, 121975), (175, 112217), (205, 95795), (245, 80155), (287, 68425), (391, 50225), (425, 46207), (575, 34153), (595, 33005), (697, 28175), (805, 24395), (833, 23575), (943, 20825), (1025, 19159), (1127, 17425), (1225, 16031), (1435, 13685), (1955, 10045), (2009, 9775), (2737, 7175), (2975, 6601), (3485, 5635), (4025, 4879), (4165, 4715)]