21445160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:147

約数の個数: 128

約数和(自身を含む): 57853440

約数和(自身を除く): 36408280

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 47, 55, 61, 68, 85, 88, 94, 110, 122, 136, 170, 187, 188, 220, 235, 244, 305, 340, 374, 376, 440, 470, 488, 517, 610, 671, 680, 748, 799, 935, 940, 1034, 1037, 1220, 1342, 1496, 1598, 1870, 1880, 2068, 2074, 2440, 2585, 2684, 2867, 3196, 3355, 3740, 3995, 4136, 4148, 5170, 5185, 5368, 5734, 6392, 6710, 7480, 7990, 8296, 8789, 10340, 10370, 11407, 11468, 13420, 14335, 15980, 17578, 20680, 20740, 22814, 22936, 26840, 28670, 31537, 31960, 35156, 41480, 43945, 45628, 48739, 57035, 57340, 63074, 70312, 87890, 91256, 97478, 114070, 114680, 126148, 157685, 175780, 194956, 228140, 243695, 252296, 315370, 351560, 389912, 456280, 487390, 536129, 630740, 974780, 1072258, 1261480, 1949560, 2144516, 2680645, 4289032, 5361290, 10722580, 21445160]

約数ペア:

[(1, 21445160), (2, 10722580), (4, 5361290), (5, 4289032), (8, 2680645), (10, 2144516), (11, 1949560), (17, 1261480), (20, 1072258), (22, 974780), (34, 630740), (40, 536129), (44, 487390), (47, 456280), (55, 389912), (61, 351560), (68, 315370), (85, 252296), (88, 243695), (94, 228140), (110, 194956), (122, 175780), (136, 157685), (170, 126148), (187, 114680), (188, 114070), (220, 97478), (235, 91256), (244, 87890), (305, 70312), (340, 63074), (374, 57340), (376, 57035), (440, 48739), (470, 45628), (488, 43945), (517, 41480), (610, 35156), (671, 31960), (680, 31537), (748, 28670), (799, 26840), (935, 22936), (940, 22814), (1034, 20740), (1037, 20680), (1220, 17578), (1342, 15980), (1496, 14335), (1598, 13420), (1870, 11468), (1880, 11407), (2068, 10370), (2074, 10340), (2440, 8789), (2585, 8296), (2684, 7990), (2867, 7480), (3196, 6710), (3355, 6392), (3740, 5734), (3995, 5368), (4136, 5185), (4148, 5170)]