21865140

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1$

素因数の和:444

約数の個数: 144

約数和(自身を含む): 75216960

約数和(自身を除く): 53351820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 81, 90, 99, 108, 110, 132, 135, 162, 165, 180, 198, 220, 243, 270, 297, 324, 330, 396, 405, 409, 486, 495, 540, 594, 660, 810, 818, 891, 972, 990, 1188, 1215, 1227, 1485, 1620, 1636, 1782, 1980, 2045, 2430, 2454, 2673, 2970, 3564, 3681, 4090, 4455, 4499, 4860, 4908, 5346, 5940, 6135, 7362, 8180, 8910, 8998, 10692, 11043, 12270, 13365, 13497, 14724, 17820, 17996, 18405, 22086, 22495, 24540, 26730, 26994, 33129, 36810, 40491, 44172, 44990, 53460, 53988, 55215, 66258, 67485, 73620, 80982, 89980, 99387, 110430, 121473, 132516, 134970, 161964, 165645, 198774, 202455, 220860, 242946, 269940, 331290, 364419, 397548, 404910, 485892, 496935, 607365, 662580, 728838, 809820, 993870, 1093257, 1214730, 1457676, 1822095, 1987740, 2186514, 2429460, 3644190, 4373028, 5466285, 7288380, 10932570, 21865140]

約数ペア:

[(1, 21865140), (2, 10932570), (3, 7288380), (4, 5466285), (5, 4373028), (6, 3644190), (9, 2429460), (10, 2186514), (11, 1987740), (12, 1822095), (15, 1457676), (18, 1214730), (20, 1093257), (22, 993870), (27, 809820), (30, 728838), (33, 662580), (36, 607365), (44, 496935), (45, 485892), (54, 404910), (55, 397548), (60, 364419), (66, 331290), (81, 269940), (90, 242946), (99, 220860), (108, 202455), (110, 198774), (132, 165645), (135, 161964), (162, 134970), (165, 132516), (180, 121473), (198, 110430), (220, 99387), (243, 89980), (270, 80982), (297, 73620), (324, 67485), (330, 66258), (396, 55215), (405, 53988), (409, 53460), (486, 44990), (495, 44172), (540, 40491), (594, 36810), (660, 33129), (810, 26994), (818, 26730), (891, 24540), (972, 22495), (990, 22086), (1188, 18405), (1215, 17996), (1227, 17820), (1485, 14724), (1620, 13497), (1636, 13365), (1782, 12270), (1980, 11043), (2045, 10692), (2430, 8998), (2454, 8910), (2673, 8180), (2970, 7362), (3564, 6135), (3681, 5940), (4090, 5346), (4455, 4908), (4499, 4860)]