21418400

素因数分解:

$2^5\times 5^2\times {\mathrm{41}}^1\times {\mathrm{653}}^1$

素因数の和:714

約数の個数: 72

約数和(自身を含む): 53645004

約数和(自身を除く): 32226604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 80, 82, 100, 160, 164, 200, 205, 328, 400, 410, 653, 656, 800, 820, 1025, 1306, 1312, 1640, 2050, 2612, 3265, 3280, 4100, 5224, 6530, 6560, 8200, 10448, 13060, 16325, 16400, 20896, 26120, 26773, 32650, 32800, 52240, 53546, 65300, 104480, 107092, 130600, 133865, 214184, 261200, 267730, 428368, 522400, 535460, 669325, 856736, 1070920, 1338650, 2141840, 2677300, 4283680, 5354600, 10709200, 21418400]

約数ペア:

[(1, 21418400), (2, 10709200), (4, 5354600), (5, 4283680), (8, 2677300), (10, 2141840), (16, 1338650), (20, 1070920), (25, 856736), (32, 669325), (40, 535460), (41, 522400), (50, 428368), (80, 267730), (82, 261200), (100, 214184), (160, 133865), (164, 130600), (200, 107092), (205, 104480), (328, 65300), (400, 53546), (410, 52240), (653, 32800), (656, 32650), (800, 26773), (820, 26120), (1025, 20896), (1306, 16400), (1312, 16325), (1640, 13060), (2050, 10448), (2612, 8200), (3265, 6560), (3280, 6530), (4100, 5224)]