20958880

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4517}}^1$

素因数の和:4561

約数の個数: 48

約数和(自身を含む): 51234120

約数和(自身を除く): 30275240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4517, 4640, 9034, 18068, 22585, 36136, 45170, 72272, 90340, 130993, 144544, 180680, 261986, 361360, 523972, 654965, 722720, 1047944, 1309930, 2095888, 2619860, 4191776, 5239720, 10479440, 20958880]

約数ペア:

[(1, 20958880), (2, 10479440), (4, 5239720), (5, 4191776), (8, 2619860), (10, 2095888), (16, 1309930), (20, 1047944), (29, 722720), (32, 654965), (40, 523972), (58, 361360), (80, 261986), (116, 180680), (145, 144544), (160, 130993), (232, 90340), (290, 72272), (464, 45170), (580, 36136), (928, 22585), (1160, 18068), (2320, 9034), (4517, 4640)]