21461480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{853}}^1$

素因数の和:918

約数の個数: 64

約数和(自身を含む): 52572240

約数和(自身を除く): 31110760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 68, 74, 85, 136, 148, 170, 185, 296, 340, 370, 629, 680, 740, 853, 1258, 1480, 1706, 2516, 3145, 3412, 4265, 5032, 6290, 6824, 8530, 12580, 14501, 17060, 25160, 29002, 31561, 34120, 58004, 63122, 72505, 116008, 126244, 145010, 157805, 252488, 290020, 315610, 536537, 580040, 631220, 1073074, 1262440, 2146148, 2682685, 4292296, 5365370, 10730740, 21461480]

約数ペア:

[(1, 21461480), (2, 10730740), (4, 5365370), (5, 4292296), (8, 2682685), (10, 2146148), (17, 1262440), (20, 1073074), (34, 631220), (37, 580040), (40, 536537), (68, 315610), (74, 290020), (85, 252488), (136, 157805), (148, 145010), (170, 126244), (185, 116008), (296, 72505), (340, 63122), (370, 58004), (629, 34120), (680, 31561), (740, 29002), (853, 25160), (1258, 17060), (1480, 14501), (1706, 12580), (2516, 8530), (3145, 6824), (3412, 6290), (4265, 5032)]