20842020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1301}}^1$

素因数の和:1405

約数の個数: 72

約数和(自身を含む): 63980280

約数和(自身を除く): 43138260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1301, 1335, 1602, 1780, 2602, 2670, 3204, 3903, 4005, 5204, 5340, 6505, 7806, 8010, 11709, 13010, 15612, 16020, 19515, 23418, 26020, 39030, 46836, 58545, 78060, 115789, 117090, 231578, 234180, 347367, 463156, 578945, 694734, 1042101, 1157890, 1389468, 1736835, 2084202, 2315780, 3473670, 4168404, 5210505, 6947340, 10421010, 20842020]

約数ペア:

[(1, 20842020), (2, 10421010), (3, 6947340), (4, 5210505), (5, 4168404), (6, 3473670), (9, 2315780), (10, 2084202), (12, 1736835), (15, 1389468), (18, 1157890), (20, 1042101), (30, 694734), (36, 578945), (45, 463156), (60, 347367), (89, 234180), (90, 231578), (178, 117090), (180, 115789), (267, 78060), (356, 58545), (445, 46836), (534, 39030), (801, 26020), (890, 23418), (1068, 19515), (1301, 16020), (1335, 15612), (1602, 13010), (1780, 11709), (2602, 8010), (2670, 7806), (3204, 6505), (3903, 5340), (4005, 5204)]