19801628

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{269}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 23743972

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 239, 269, 308, 478, 538, 956, 1076, 1673, 1883, 2629, 2959, 3346, 3766, 5258, 5918, 6692, 7532, 10516, 11836, 18403, 20713, 36806, 41426, 64291, 73612, 82852, 128582, 257164, 450037, 707201, 900074, 1414402, 1800148, 2828804, 4950407, 9900814, 19801628]

約数ペア:

[(1, 19801628), (2, 9900814), (4, 4950407), (7, 2828804), (11, 1800148), (14, 1414402), (22, 900074), (28, 707201), (44, 450037), (77, 257164), (154, 128582), (239, 82852), (269, 73612), (308, 64291), (478, 41426), (538, 36806), (956, 20713), (1076, 18403), (1673, 11836), (1883, 10516), (2629, 7532), (2959, 6692), (3346, 5918), (3766, 5258)]