21702880

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:212

約数の個数: 96

約数和(自身を含む): 55520640

約数和(自身を除く): 33817760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 79, 80, 85, 101, 136, 158, 160, 170, 202, 272, 316, 340, 395, 404, 505, 544, 632, 680, 790, 808, 1010, 1264, 1343, 1360, 1580, 1616, 1717, 2020, 2528, 2686, 2720, 3160, 3232, 3434, 4040, 5372, 6320, 6715, 6868, 7979, 8080, 8585, 10744, 12640, 13430, 13736, 15958, 16160, 17170, 21488, 26860, 27472, 31916, 34340, 39895, 42976, 53720, 54944, 63832, 68680, 79790, 107440, 127664, 135643, 137360, 159580, 214880, 255328, 271286, 274720, 319160, 542572, 638320, 678215, 1085144, 1276640, 1356430, 2170288, 2712860, 4340576, 5425720, 10851440, 21702880]

約数ペア:

[(1, 21702880), (2, 10851440), (4, 5425720), (5, 4340576), (8, 2712860), (10, 2170288), (16, 1356430), (17, 1276640), (20, 1085144), (32, 678215), (34, 638320), (40, 542572), (68, 319160), (79, 274720), (80, 271286), (85, 255328), (101, 214880), (136, 159580), (158, 137360), (160, 135643), (170, 127664), (202, 107440), (272, 79790), (316, 68680), (340, 63832), (395, 54944), (404, 53720), (505, 42976), (544, 39895), (632, 34340), (680, 31916), (790, 27472), (808, 26860), (1010, 21488), (1264, 17170), (1343, 16160), (1360, 15958), (1580, 13736), (1616, 13430), (1717, 12640), (2020, 10744), (2528, 8585), (2686, 8080), (2720, 7979), (3160, 6868), (3232, 6715), (3434, 6320), (4040, 5372)]