21857505

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1\times {\mathrm{283}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 37079040

約数和(自身を除く): 15221535

約数列:

[1, 3, 5, 15, 19, 57, 95, 271, 283, 285, 813, 849, 1355, 1415, 4065, 4245, 5149, 5377, 15447, 16131, 25745, 26885, 76693, 77235, 80655, 230079, 383465, 1150395, 1457167, 4371501, 7285835, 21857505]

約数ペア:

[(1, 21857505), (3, 7285835), (5, 4371501), (15, 1457167), (19, 1150395), (57, 383465), (95, 230079), (271, 80655), (283, 77235), (285, 76693), (813, 26885), (849, 25745), (1355, 16131), (1415, 15447), (4065, 5377), (4245, 5149)]