20955928

素因数分解:

$2^3\times 7^4\times {\mathrm{1091}}^1$

素因数の和:1125

約数の個数: 40

約数和(自身を含む): 45880380

約数和(自身を除く): 24924452

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 343, 392, 686, 1091, 1372, 2182, 2401, 2744, 4364, 4802, 7637, 8728, 9604, 15274, 19208, 30548, 53459, 61096, 106918, 213836, 374213, 427672, 748426, 1496852, 2619491, 2993704, 5238982, 10477964, 20955928]

約数ペア:

[(1, 20955928), (2, 10477964), (4, 5238982), (7, 2993704), (8, 2619491), (14, 1496852), (28, 748426), (49, 427672), (56, 374213), (98, 213836), (196, 106918), (343, 61096), (392, 53459), (686, 30548), (1091, 19208), (1372, 15274), (2182, 9604), (2401, 8728), (2744, 7637), (4364, 4802)]