20581820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1301}}^1$

素因数の和:1430

約数の個数: 48

約数和(自身を含む): 49871808

約数和(自身を除く): 29289988

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 113, 140, 226, 452, 565, 791, 1130, 1301, 1582, 2260, 2602, 3164, 3955, 5204, 6505, 7910, 9107, 13010, 15820, 18214, 26020, 36428, 45535, 91070, 147013, 182140, 294026, 588052, 735065, 1029091, 1470130, 2058182, 2940260, 4116364, 5145455, 10290910, 20581820]

約数ペア:

[(1, 20581820), (2, 10290910), (4, 5145455), (5, 4116364), (7, 2940260), (10, 2058182), (14, 1470130), (20, 1029091), (28, 735065), (35, 588052), (70, 294026), (113, 182140), (140, 147013), (226, 91070), (452, 45535), (565, 36428), (791, 26020), (1130, 18214), (1301, 15820), (1582, 13010), (2260, 9107), (2602, 7910), (3164, 6505), (3955, 5204)]