1209888400

素因数分解:

$2^4\times 5^2\times 7^2\times {\mathrm{61729}}^1$

素因数の和:61761

約数の個数: 90

約数和(自身を含む): 3381384210

約数和(自身を除く): 2171495810

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 140, 175, 196, 200, 245, 280, 350, 392, 400, 490, 560, 700, 784, 980, 1225, 1400, 1960, 2450, 2800, 3920, 4900, 9800, 19600, 61729, 123458, 246916, 308645, 432103, 493832, 617290, 864206, 987664, 1234580, 1543225, 1728412, 2160515, 2469160, 3024721, 3086450, 3456824, 4321030, 4938320, 6049442, 6172900, 6913648, 8642060, 10802575, 12098884, 12345800, 15123605, 17284120, 21605150, 24197768, 24691600, 30247210, 34568240, 43210300, 48395536, 60494420, 75618025, 86420600, 120988840, 151236050, 172841200, 241977680, 302472100, 604944200, 1209888400]

約数ペア:

[(1, 1209888400), (2, 604944200), (4, 302472100), (5, 241977680), (7, 172841200), (8, 151236050), (10, 120988840), (14, 86420600), (16, 75618025), (20, 60494420), (25, 48395536), (28, 43210300), (35, 34568240), (40, 30247210), (49, 24691600), (50, 24197768), (56, 21605150), (70, 17284120), (80, 15123605), (98, 12345800), (100, 12098884), (112, 10802575), (140, 8642060), (175, 6913648), (196, 6172900), (200, 6049442), (245, 4938320), (280, 4321030), (350, 3456824), (392, 3086450), (400, 3024721), (490, 2469160), (560, 2160515), (700, 1728412), (784, 1543225), (980, 1234580), (1225, 987664), (1400, 864206), (1960, 617290), (2450, 493832), (2800, 432103), (3920, 308645), (4900, 246916), (9800, 123458), (19600, 61729)]