20811700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2287}}^1$

素因数の和:2321

約数の個数: 72

約数和(自身を含む): 55607552

約数和(自身を除く): 34795852

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 50, 52, 65, 70, 91, 100, 130, 140, 175, 182, 260, 325, 350, 364, 455, 650, 700, 910, 1300, 1820, 2275, 2287, 4550, 4574, 9100, 9148, 11435, 16009, 22870, 29731, 32018, 45740, 57175, 59462, 64036, 80045, 114350, 118924, 148655, 160090, 208117, 228700, 297310, 320180, 400225, 416234, 594620, 743275, 800450, 832468, 1040585, 1486550, 1600900, 2081170, 2973100, 4162340, 5202925, 10405850, 20811700]

約数ペア:

[(1, 20811700), (2, 10405850), (4, 5202925), (5, 4162340), (7, 2973100), (10, 2081170), (13, 1600900), (14, 1486550), (20, 1040585), (25, 832468), (26, 800450), (28, 743275), (35, 594620), (50, 416234), (52, 400225), (65, 320180), (70, 297310), (91, 228700), (100, 208117), (130, 160090), (140, 148655), (175, 118924), (182, 114350), (260, 80045), (325, 64036), (350, 59462), (364, 57175), (455, 45740), (650, 32018), (700, 29731), (910, 22870), (1300, 16009), (1820, 11435), (2275, 9148), (2287, 9100), (4550, 4574)]