21505575

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:193

約数の個数: 96

約数和(自身を含む): 45997056

約数和(自身を除く): 24491481

約数列:

[1, 3, 5, 7, 13, 15, 21, 23, 25, 35, 39, 65, 69, 75, 91, 105, 115, 137, 161, 175, 195, 273, 299, 325, 345, 411, 455, 483, 525, 575, 685, 805, 897, 959, 975, 1365, 1495, 1725, 1781, 2055, 2093, 2275, 2415, 2877, 3151, 3425, 4025, 4485, 4795, 5343, 6279, 6825, 7475, 8905, 9453, 10275, 10465, 12075, 12467, 14385, 15755, 22057, 22425, 23975, 26715, 31395, 37401, 40963, 44525, 47265, 52325, 62335, 66171, 71925, 78775, 110285, 122889, 133575, 156975, 187005, 204815, 236325, 286741, 311675, 330855, 551425, 614445, 860223, 935025, 1024075, 1433705, 1654275, 3072225, 4301115, 7168525, 21505575]

約数ペア:

[(1, 21505575), (3, 7168525), (5, 4301115), (7, 3072225), (13, 1654275), (15, 1433705), (21, 1024075), (23, 935025), (25, 860223), (35, 614445), (39, 551425), (65, 330855), (69, 311675), (75, 286741), (91, 236325), (105, 204815), (115, 187005), (137, 156975), (161, 133575), (175, 122889), (195, 110285), (273, 78775), (299, 71925), (325, 66171), (345, 62335), (411, 52325), (455, 47265), (483, 44525), (525, 40963), (575, 37401), (685, 31395), (805, 26715), (897, 23975), (959, 22425), (975, 22057), (1365, 15755), (1495, 14385), (1725, 12467), (1781, 12075), (2055, 10465), (2093, 10275), (2275, 9453), (2415, 8905), (2877, 7475), (3151, 6825), (3425, 6279), (4025, 5343), (4485, 4795)]