21788560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{433}}^1$

素因数の和:500

約数の個数: 80

約数和(自身を含む): 55215216

約数和(自身を除く): 33426656

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 433, 592, 629, 680, 740, 866, 1258, 1360, 1480, 1732, 2165, 2516, 2960, 3145, 3464, 4330, 5032, 6290, 6928, 7361, 8660, 10064, 12580, 14722, 16021, 17320, 25160, 29444, 32042, 34640, 36805, 50320, 58888, 64084, 73610, 80105, 117776, 128168, 147220, 160210, 256336, 272357, 294440, 320420, 544714, 588880, 640840, 1089428, 1281680, 1361785, 2178856, 2723570, 4357712, 5447140, 10894280, 21788560]

約数ペア:

[(1, 21788560), (2, 10894280), (4, 5447140), (5, 4357712), (8, 2723570), (10, 2178856), (16, 1361785), (17, 1281680), (20, 1089428), (34, 640840), (37, 588880), (40, 544714), (68, 320420), (74, 294440), (80, 272357), (85, 256336), (136, 160210), (148, 147220), (170, 128168), (185, 117776), (272, 80105), (296, 73610), (340, 64084), (370, 58888), (433, 50320), (592, 36805), (629, 34640), (680, 32042), (740, 29444), (866, 25160), (1258, 17320), (1360, 16021), (1480, 14722), (1732, 12580), (2165, 10064), (2516, 8660), (2960, 7361), (3145, 6928), (3464, 6290), (4330, 5032)]