20961200

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:199

約数の個数: 120

約数和(自身を含む): 56506800

約数和(自身を除く): 35545600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 29, 40, 50, 52, 58, 65, 80, 100, 104, 116, 130, 139, 145, 200, 208, 232, 260, 278, 290, 325, 377, 400, 464, 520, 556, 580, 650, 695, 725, 754, 1040, 1112, 1160, 1300, 1390, 1450, 1508, 1807, 1885, 2224, 2320, 2600, 2780, 2900, 3016, 3475, 3614, 3770, 4031, 5200, 5560, 5800, 6032, 6950, 7228, 7540, 8062, 9035, 9425, 11120, 11600, 13900, 14456, 15080, 16124, 18070, 18850, 20155, 27800, 28912, 30160, 32248, 36140, 37700, 40310, 45175, 52403, 55600, 64496, 72280, 75400, 80620, 90350, 100775, 104806, 144560, 150800, 161240, 180700, 201550, 209612, 262015, 322480, 361400, 403100, 419224, 524030, 722800, 806200, 838448, 1048060, 1310075, 1612400, 2096120, 2620150, 4192240, 5240300, 10480600, 20961200]

約数ペア:

[(1, 20961200), (2, 10480600), (4, 5240300), (5, 4192240), (8, 2620150), (10, 2096120), (13, 1612400), (16, 1310075), (20, 1048060), (25, 838448), (26, 806200), (29, 722800), (40, 524030), (50, 419224), (52, 403100), (58, 361400), (65, 322480), (80, 262015), (100, 209612), (104, 201550), (116, 180700), (130, 161240), (139, 150800), (145, 144560), (200, 104806), (208, 100775), (232, 90350), (260, 80620), (278, 75400), (290, 72280), (325, 64496), (377, 55600), (400, 52403), (464, 45175), (520, 40310), (556, 37700), (580, 36140), (650, 32248), (695, 30160), (725, 28912), (754, 27800), (1040, 20155), (1112, 18850), (1160, 18070), (1300, 16124), (1390, 15080), (1450, 14456), (1508, 13900), (1807, 11600), (1885, 11120), (2224, 9425), (2320, 9035), (2600, 8062), (2780, 7540), (2900, 7228), (3016, 6950), (3475, 6032), (3614, 5800), (3770, 5560), (4031, 5200)]