21780900

素因数分解:

$2^2\times 3^4\times 5^2\times {\mathrm{2689}}^1$

素因数の和:2715

約数の個数: 90

約数和(自身を含む): 70631330

約数和(自身を除く): 48850430

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 54, 60, 75, 81, 90, 100, 108, 135, 150, 162, 180, 225, 270, 300, 324, 405, 450, 540, 675, 810, 900, 1350, 1620, 2025, 2689, 2700, 4050, 5378, 8067, 8100, 10756, 13445, 16134, 24201, 26890, 32268, 40335, 48402, 53780, 67225, 72603, 80670, 96804, 121005, 134450, 145206, 161340, 201675, 217809, 242010, 268900, 290412, 363015, 403350, 435618, 484020, 605025, 726030, 806700, 871236, 1089045, 1210050, 1452060, 1815075, 2178090, 2420100, 3630150, 4356180, 5445225, 7260300, 10890450, 21780900]

約数ペア:

[(1, 21780900), (2, 10890450), (3, 7260300), (4, 5445225), (5, 4356180), (6, 3630150), (9, 2420100), (10, 2178090), (12, 1815075), (15, 1452060), (18, 1210050), (20, 1089045), (25, 871236), (27, 806700), (30, 726030), (36, 605025), (45, 484020), (50, 435618), (54, 403350), (60, 363015), (75, 290412), (81, 268900), (90, 242010), (100, 217809), (108, 201675), (135, 161340), (150, 145206), (162, 134450), (180, 121005), (225, 96804), (270, 80670), (300, 72603), (324, 67225), (405, 53780), (450, 48402), (540, 40335), (675, 32268), (810, 26890), (900, 24201), (1350, 16134), (1620, 13445), (2025, 10756), (2689, 8100), (2700, 8067), (4050, 5378)]