20458140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:707

約数の個数: 96

約数和(自身を含む): 62705664

約数和(自身を除く): 42247524

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 31, 34, 51, 60, 62, 68, 85, 93, 102, 124, 155, 170, 186, 204, 255, 310, 340, 372, 465, 510, 527, 620, 647, 930, 1020, 1054, 1294, 1581, 1860, 1941, 2108, 2588, 2635, 3162, 3235, 3882, 5270, 6324, 6470, 7764, 7905, 9705, 10540, 10999, 12940, 15810, 19410, 20057, 21998, 31620, 32997, 38820, 40114, 43996, 54995, 60171, 65994, 80228, 100285, 109990, 120342, 131988, 164985, 200570, 219980, 240684, 300855, 329970, 340969, 401140, 601710, 659940, 681938, 1022907, 1203420, 1363876, 1704845, 2045814, 3409690, 4091628, 5114535, 6819380, 10229070, 20458140]

約数ペア:

[(1, 20458140), (2, 10229070), (3, 6819380), (4, 5114535), (5, 4091628), (6, 3409690), (10, 2045814), (12, 1704845), (15, 1363876), (17, 1203420), (20, 1022907), (30, 681938), (31, 659940), (34, 601710), (51, 401140), (60, 340969), (62, 329970), (68, 300855), (85, 240684), (93, 219980), (102, 200570), (124, 164985), (155, 131988), (170, 120342), (186, 109990), (204, 100285), (255, 80228), (310, 65994), (340, 60171), (372, 54995), (465, 43996), (510, 40114), (527, 38820), (620, 32997), (647, 31620), (930, 21998), (1020, 20057), (1054, 19410), (1294, 15810), (1581, 12940), (1860, 10999), (1941, 10540), (2108, 9705), (2588, 7905), (2635, 7764), (3162, 6470), (3235, 6324), (3882, 5270)]