21100212

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:158

約数の個数: 144

約数和(自身を含む): 65508352

約数和(自身を除く): 44408140

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 31, 36, 37, 42, 62, 63, 73, 74, 84, 93, 111, 124, 126, 146, 148, 186, 217, 219, 222, 252, 259, 279, 292, 333, 372, 434, 438, 444, 511, 518, 558, 651, 657, 666, 777, 868, 876, 1022, 1036, 1116, 1147, 1302, 1314, 1332, 1533, 1554, 1953, 2044, 2263, 2294, 2331, 2604, 2628, 2701, 3066, 3108, 3441, 3906, 4526, 4588, 4599, 4662, 5402, 6132, 6789, 6882, 7812, 8029, 8103, 9052, 9198, 9324, 10323, 10804, 13578, 13764, 15841, 16058, 16206, 18396, 18907, 20367, 20646, 24087, 24309, 27156, 31682, 32116, 32412, 37814, 40734, 41292, 47523, 48174, 48618, 56721, 63364, 72261, 75628, 81468, 83731, 95046, 96348, 97236, 113442, 142569, 144522, 167462, 170163, 190092, 226884, 251193, 285138, 289044, 334924, 340326, 502386, 570276, 586117, 680652, 753579, 1004772, 1172234, 1507158, 1758351, 2344468, 3014316, 3516702, 5275053, 7033404, 10550106, 21100212]

約数ペア:

[(1, 21100212), (2, 10550106), (3, 7033404), (4, 5275053), (6, 3516702), (7, 3014316), (9, 2344468), (12, 1758351), (14, 1507158), (18, 1172234), (21, 1004772), (28, 753579), (31, 680652), (36, 586117), (37, 570276), (42, 502386), (62, 340326), (63, 334924), (73, 289044), (74, 285138), (84, 251193), (93, 226884), (111, 190092), (124, 170163), (126, 167462), (146, 144522), (148, 142569), (186, 113442), (217, 97236), (219, 96348), (222, 95046), (252, 83731), (259, 81468), (279, 75628), (292, 72261), (333, 63364), (372, 56721), (434, 48618), (438, 48174), (444, 47523), (511, 41292), (518, 40734), (558, 37814), (651, 32412), (657, 32116), (666, 31682), (777, 27156), (868, 24309), (876, 24087), (1022, 20646), (1036, 20367), (1116, 18907), (1147, 18396), (1302, 16206), (1314, 16058), (1332, 15841), (1533, 13764), (1554, 13578), (1953, 10804), (2044, 10323), (2263, 9324), (2294, 9198), (2331, 9052), (2604, 8103), (2628, 8029), (2701, 7812), (3066, 6882), (3108, 6789), (3441, 6132), (3906, 5402), (4526, 4662), (4588, 4599)]