21120800

素因数分解:

$2^5\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1553}}^1$

素因数の和:1590

約数の個数: 72

約数和(自身を含む): 54629316

約数和(自身を除く): 33508516

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 50, 68, 80, 85, 100, 136, 160, 170, 200, 272, 340, 400, 425, 544, 680, 800, 850, 1360, 1553, 1700, 2720, 3106, 3400, 6212, 6800, 7765, 12424, 13600, 15530, 24848, 26401, 31060, 38825, 49696, 52802, 62120, 77650, 105604, 124240, 132005, 155300, 211208, 248480, 264010, 310600, 422416, 528020, 621200, 660025, 844832, 1056040, 1242400, 1320050, 2112080, 2640100, 4224160, 5280200, 10560400, 21120800]

約数ペア:

[(1, 21120800), (2, 10560400), (4, 5280200), (5, 4224160), (8, 2640100), (10, 2112080), (16, 1320050), (17, 1242400), (20, 1056040), (25, 844832), (32, 660025), (34, 621200), (40, 528020), (50, 422416), (68, 310600), (80, 264010), (85, 248480), (100, 211208), (136, 155300), (160, 132005), (170, 124240), (200, 105604), (272, 77650), (340, 62120), (400, 52802), (425, 49696), (544, 38825), (680, 31060), (800, 26401), (850, 24848), (1360, 15530), (1553, 13600), (1700, 12424), (2720, 7765), (3106, 6800), (3400, 6212)]