20451195

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 37132992

約数和(自身を除く): 16681797

約数列:

[1, 3, 5, 9, 15, 37, 45, 71, 111, 173, 185, 213, 333, 355, 519, 555, 639, 865, 1065, 1557, 1665, 2595, 2627, 3195, 6401, 7785, 7881, 12283, 13135, 19203, 23643, 32005, 36849, 39405, 57609, 61415, 96015, 110547, 118215, 184245, 288045, 454471, 552735, 1363413, 2272355, 4090239, 6817065, 20451195]

約数ペア:

[(1, 20451195), (3, 6817065), (5, 4090239), (9, 2272355), (15, 1363413), (37, 552735), (45, 454471), (71, 288045), (111, 184245), (173, 118215), (185, 110547), (213, 96015), (333, 61415), (355, 57609), (519, 39405), (555, 36849), (639, 32005), (865, 23643), (1065, 19203), (1557, 13135), (1665, 12283), (2595, 7881), (2627, 7785), (3195, 6401)]