21582820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4973}}^1$

素因数の和:5020

約数の個数: 48

約数和(自身を含む): 53480448

約数和(自身を除く): 31897628

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4973, 9946, 19892, 24865, 34811, 49730, 69622, 99460, 139244, 154163, 174055, 308326, 348110, 616652, 696220, 770815, 1079141, 1541630, 2158282, 3083260, 4316564, 5395705, 10791410, 21582820]

約数ペア:

[(1, 21582820), (2, 10791410), (4, 5395705), (5, 4316564), (7, 3083260), (10, 2158282), (14, 1541630), (20, 1079141), (28, 770815), (31, 696220), (35, 616652), (62, 348110), (70, 308326), (124, 174055), (140, 154163), (155, 139244), (217, 99460), (310, 69622), (434, 49730), (620, 34811), (868, 24865), (1085, 19892), (2170, 9946), (4340, 4973)]