28213120

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{3391}}^1$

素因数の和:3423

約数の個数: 64

約数和(自身を含む): 72656640

約数和(自身を除く): 44443520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 3391, 4160, 6782, 8320, 13564, 16955, 27128, 33910, 44083, 54256, 67820, 88166, 108512, 135640, 176332, 217024, 220415, 271280, 352664, 434048, 440830, 542560, 705328, 881660, 1085120, 1410656, 1763320, 2170240, 2821312, 3526640, 5642624, 7053280, 14106560, 28213120]

約数ペア:

[(1, 28213120), (2, 14106560), (4, 7053280), (5, 5642624), (8, 3526640), (10, 2821312), (13, 2170240), (16, 1763320), (20, 1410656), (26, 1085120), (32, 881660), (40, 705328), (52, 542560), (64, 440830), (65, 434048), (80, 352664), (104, 271280), (128, 220415), (130, 217024), (160, 176332), (208, 135640), (260, 108512), (320, 88166), (416, 67820), (520, 54256), (640, 44083), (832, 33910), (1040, 27128), (1664, 16955), (2080, 13564), (3391, 8320), (4160, 6782)]