21781740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{4973}}^1$

素因数の和:5058

約数の個数: 48

約数和(自身を含む): 61836768

約数和(自身を除く): 40055028

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 73, 146, 219, 292, 365, 438, 730, 876, 1095, 1460, 2190, 4380, 4973, 9946, 14919, 19892, 24865, 29838, 49730, 59676, 74595, 99460, 149190, 298380, 363029, 726058, 1089087, 1452116, 1815145, 2178174, 3630290, 4356348, 5445435, 7260580, 10890870, 21781740]

約数ペア:

[(1, 21781740), (2, 10890870), (3, 7260580), (4, 5445435), (5, 4356348), (6, 3630290), (10, 2178174), (12, 1815145), (15, 1452116), (20, 1089087), (30, 726058), (60, 363029), (73, 298380), (146, 149190), (219, 99460), (292, 74595), (365, 59676), (438, 49730), (730, 29838), (876, 24865), (1095, 19892), (1460, 14919), (2190, 9946), (4380, 4973)]