21729806

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{541}}^1$

素因数の和:720

約数の個数: 32

約数和(自身を含む): 39544320

約数和(自身を除く): 17814514

約数列:

[1, 2, 7, 14, 19, 38, 133, 151, 266, 302, 541, 1057, 1082, 2114, 2869, 3787, 5738, 7574, 10279, 20083, 20558, 40166, 71953, 81691, 143906, 163382, 571837, 1143674, 1552129, 3104258, 10864903, 21729806]

約数ペア:

[(1, 21729806), (2, 10864903), (7, 3104258), (14, 1552129), (19, 1143674), (38, 571837), (133, 163382), (151, 143906), (266, 81691), (302, 71953), (541, 40166), (1057, 20558), (1082, 20083), (2114, 10279), (2869, 7574), (3787, 5738)]