81581325

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:387

約数の個数: 72

約数和(自身を含む): 159454080

約数和(自身を除く): 77872755

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 75, 79, 105, 147, 175, 237, 245, 281, 395, 525, 553, 735, 843, 1185, 1225, 1405, 1659, 1967, 1975, 2765, 3675, 3871, 4215, 5901, 5925, 7025, 8295, 9835, 11613, 13769, 13825, 19355, 21075, 22199, 29505, 41307, 41475, 49175, 58065, 66597, 68845, 96775, 110995, 147525, 155393, 206535, 290325, 332985, 344225, 466179, 554975, 776965, 1032675, 1087751, 1664925, 2330895, 3263253, 3884825, 5438755, 11654475, 16316265, 27193775, 81581325]

約数ペア:

[(1, 81581325), (3, 27193775), (5, 16316265), (7, 11654475), (15, 5438755), (21, 3884825), (25, 3263253), (35, 2330895), (49, 1664925), (75, 1087751), (79, 1032675), (105, 776965), (147, 554975), (175, 466179), (237, 344225), (245, 332985), (281, 290325), (395, 206535), (525, 155393), (553, 147525), (735, 110995), (843, 96775), (1185, 68845), (1225, 66597), (1405, 58065), (1659, 49175), (1967, 41475), (1975, 41307), (2765, 29505), (3675, 22199), (3871, 21075), (4215, 19355), (5901, 13825), (5925, 13769), (7025, 11613), (8295, 9835)]