21507318

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1303}}^1$

素因数の和:1449

約数の個数: 48

約数和(自身を含む): 53703936

約数和(自身を除く): 32196618

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 131, 262, 393, 786, 917, 1179, 1303, 1834, 2358, 2606, 2751, 3909, 5502, 7818, 8253, 9121, 11727, 16506, 18242, 23454, 27363, 54726, 82089, 164178, 170693, 341386, 512079, 1024158, 1194851, 1536237, 2389702, 3072474, 3584553, 7169106, 10753659, 21507318]

約数ペア:

[(1, 21507318), (2, 10753659), (3, 7169106), (6, 3584553), (7, 3072474), (9, 2389702), (14, 1536237), (18, 1194851), (21, 1024158), (42, 512079), (63, 341386), (126, 170693), (131, 164178), (262, 82089), (393, 54726), (786, 27363), (917, 23454), (1179, 18242), (1303, 16506), (1834, 11727), (2358, 9121), (2606, 8253), (2751, 7818), (3909, 5502)]