21398494

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{191}}^1$

素因数の和:376

約数の個数: 32

約数和(自身を含む): 36126720

約数和(自身を除く): 14728226

約数列:

[1, 2, 13, 26, 31, 62, 139, 191, 278, 382, 403, 806, 1807, 2483, 3614, 4309, 4966, 5921, 8618, 11842, 26549, 53098, 56017, 76973, 112034, 153946, 345137, 690274, 823019, 1646038, 10699247, 21398494]

約数ペア:

[(1, 21398494), (2, 10699247), (13, 1646038), (26, 823019), (31, 690274), (62, 345137), (139, 153946), (191, 112034), (278, 76973), (382, 56017), (403, 53098), (806, 26549), (1807, 11842), (2483, 8618), (3614, 5921), (4309, 4966)]