21101115

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1511}}^1$

素因数の和:1552

約数の個数: 48

約数和(自身を含む): 41368320

約数和(自身を除く): 20267205

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1511, 1995, 2793, 4533, 4655, 7555, 10577, 13965, 22665, 28709, 31731, 52885, 74039, 86127, 143545, 158655, 200963, 222117, 370195, 430635, 602889, 1004815, 1110585, 1406741, 3014445, 4220223, 7033705, 21101115]

約数ペア:

[(1, 21101115), (3, 7033705), (5, 4220223), (7, 3014445), (15, 1406741), (19, 1110585), (21, 1004815), (35, 602889), (49, 430635), (57, 370195), (95, 222117), (105, 200963), (133, 158655), (147, 143545), (245, 86127), (285, 74039), (399, 52885), (665, 31731), (735, 28709), (931, 22665), (1511, 13965), (1995, 10577), (2793, 7555), (4533, 4655)]