20041020

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 120

約数和(自身を含む): 64033200

約数和(自身を除く): 43992180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 89, 90, 108, 135, 139, 162, 178, 180, 267, 270, 278, 324, 356, 405, 417, 445, 534, 540, 556, 695, 801, 810, 834, 890, 1068, 1251, 1335, 1390, 1602, 1620, 1668, 1780, 2085, 2403, 2502, 2670, 2780, 3204, 3753, 4005, 4170, 4806, 5004, 5340, 6255, 7209, 7506, 8010, 8340, 9612, 11259, 12015, 12371, 12510, 14418, 15012, 16020, 18765, 22518, 24030, 24742, 25020, 28836, 36045, 37113, 37530, 45036, 48060, 49484, 56295, 61855, 72090, 74226, 75060, 111339, 112590, 123710, 144180, 148452, 185565, 222678, 225180, 247420, 334017, 371130, 445356, 556695, 668034, 742260, 1002051, 1113390, 1336068, 1670085, 2004102, 2226780, 3340170, 4008204, 5010255, 6680340, 10020510, 20041020]

約数ペア:

[(1, 20041020), (2, 10020510), (3, 6680340), (4, 5010255), (5, 4008204), (6, 3340170), (9, 2226780), (10, 2004102), (12, 1670085), (15, 1336068), (18, 1113390), (20, 1002051), (27, 742260), (30, 668034), (36, 556695), (45, 445356), (54, 371130), (60, 334017), (81, 247420), (89, 225180), (90, 222678), (108, 185565), (135, 148452), (139, 144180), (162, 123710), (178, 112590), (180, 111339), (267, 75060), (270, 74226), (278, 72090), (324, 61855), (356, 56295), (405, 49484), (417, 48060), (445, 45036), (534, 37530), (540, 37113), (556, 36045), (695, 28836), (801, 25020), (810, 24742), (834, 24030), (890, 22518), (1068, 18765), (1251, 16020), (1335, 15012), (1390, 14418), (1602, 12510), (1620, 12371), (1668, 12015), (1780, 11259), (2085, 9612), (2403, 8340), (2502, 8010), (2670, 7506), (2780, 7209), (3204, 6255), (3753, 5340), (4005, 5004), (4170, 4806)]