21781284

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2179}}^1$

素因数の和:2217

約数の個数: 72

約数和(自身を含む): 62627040

約数和(自身を除く): 40845756

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 42, 49, 51, 68, 84, 98, 102, 119, 147, 196, 204, 238, 294, 357, 476, 588, 714, 833, 1428, 1666, 2179, 2499, 3332, 4358, 4998, 6537, 8716, 9996, 13074, 15253, 26148, 30506, 37043, 45759, 61012, 74086, 91518, 106771, 111129, 148172, 183036, 213542, 222258, 259301, 320313, 427084, 444516, 518602, 640626, 777903, 1037204, 1281252, 1555806, 1815107, 3111612, 3630214, 5445321, 7260428, 10890642, 21781284]

約数ペア:

[(1, 21781284), (2, 10890642), (3, 7260428), (4, 5445321), (6, 3630214), (7, 3111612), (12, 1815107), (14, 1555806), (17, 1281252), (21, 1037204), (28, 777903), (34, 640626), (42, 518602), (49, 444516), (51, 427084), (68, 320313), (84, 259301), (98, 222258), (102, 213542), (119, 183036), (147, 148172), (196, 111129), (204, 106771), (238, 91518), (294, 74086), (357, 61012), (476, 45759), (588, 37043), (714, 30506), (833, 26148), (1428, 15253), (1666, 13074), (2179, 9996), (2499, 8716), (3332, 6537), (4358, 4998)]