21090195

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 24197229

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 41, 45, 63, 69, 71, 105, 115, 123, 161, 205, 207, 213, 287, 315, 345, 355, 369, 483, 497, 615, 639, 805, 861, 943, 1035, 1065, 1435, 1449, 1491, 1633, 1845, 2415, 2485, 2583, 2829, 2911, 3195, 4305, 4473, 4715, 4899, 6601, 7245, 7455, 8165, 8487, 8733, 11431, 12915, 14145, 14555, 14697, 19803, 20377, 22365, 24495, 26199, 33005, 34293, 42435, 43665, 57155, 59409, 61131, 66953, 73485, 99015, 101885, 102879, 130995, 171465, 183393, 200859, 297045, 305655, 334765, 468671, 514395, 602577, 916965, 1004295, 1406013, 2343355, 3012885, 4218039, 7030065, 21090195]

約数ペア:

[(1, 21090195), (3, 7030065), (5, 4218039), (7, 3012885), (9, 2343355), (15, 1406013), (21, 1004295), (23, 916965), (35, 602577), (41, 514395), (45, 468671), (63, 334765), (69, 305655), (71, 297045), (105, 200859), (115, 183393), (123, 171465), (161, 130995), (205, 102879), (207, 101885), (213, 99015), (287, 73485), (315, 66953), (345, 61131), (355, 59409), (369, 57155), (483, 43665), (497, 42435), (615, 34293), (639, 33005), (805, 26199), (861, 24495), (943, 22365), (1035, 20377), (1065, 19803), (1435, 14697), (1449, 14555), (1491, 14145), (1633, 12915), (1845, 11431), (2415, 8733), (2485, 8487), (2583, 8165), (2829, 7455), (2911, 7245), (3195, 6601), (4305, 4899), (4473, 4715)]