21321972

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{211}}^1\times {\mathrm{401}}^1$

素因数の和:629

約数の個数: 72

約数和(自身を含む): 62043072

約数和(自身を除く): 40721100

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 211, 252, 401, 422, 633, 802, 844, 1203, 1266, 1477, 1604, 1899, 2406, 2532, 2807, 2954, 3609, 3798, 4431, 4812, 5614, 5908, 7218, 7596, 8421, 8862, 11228, 13293, 14436, 16842, 17724, 25263, 26586, 33684, 50526, 53172, 84611, 101052, 169222, 253833, 338444, 507666, 592277, 761499, 1015332, 1184554, 1522998, 1776831, 2369108, 3045996, 3553662, 5330493, 7107324, 10660986, 21321972]

約数ペア:

[(1, 21321972), (2, 10660986), (3, 7107324), (4, 5330493), (6, 3553662), (7, 3045996), (9, 2369108), (12, 1776831), (14, 1522998), (18, 1184554), (21, 1015332), (28, 761499), (36, 592277), (42, 507666), (63, 338444), (84, 253833), (126, 169222), (211, 101052), (252, 84611), (401, 53172), (422, 50526), (633, 33684), (802, 26586), (844, 25263), (1203, 17724), (1266, 16842), (1477, 14436), (1604, 13293), (1899, 11228), (2406, 8862), (2532, 8421), (2807, 7596), (2954, 7218), (3609, 5908), (3798, 5614), (4431, 4812)]