20861880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:381

約数の個数: 128

約数和(自身を含む): 69189120

約数和(自身を除く): 48327240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 43, 52, 60, 65, 78, 86, 104, 120, 129, 130, 156, 172, 195, 215, 258, 260, 311, 312, 344, 390, 430, 516, 520, 559, 622, 645, 780, 860, 933, 1032, 1118, 1244, 1290, 1555, 1560, 1677, 1720, 1866, 2236, 2488, 2580, 2795, 3110, 3354, 3732, 4043, 4472, 4665, 5160, 5590, 6220, 6708, 7464, 8086, 8385, 9330, 11180, 12129, 12440, 13373, 13416, 16172, 16770, 18660, 20215, 22360, 24258, 26746, 32344, 33540, 37320, 40119, 40430, 48516, 53492, 60645, 66865, 67080, 80238, 80860, 97032, 106984, 121290, 133730, 160476, 161720, 173849, 200595, 242580, 267460, 320952, 347698, 401190, 485160, 521547, 534920, 695396, 802380, 869245, 1043094, 1390792, 1604760, 1738490, 2086188, 2607735, 3476980, 4172376, 5215470, 6953960, 10430940, 20861880]

約数ペア:

[(1, 20861880), (2, 10430940), (3, 6953960), (4, 5215470), (5, 4172376), (6, 3476980), (8, 2607735), (10, 2086188), (12, 1738490), (13, 1604760), (15, 1390792), (20, 1043094), (24, 869245), (26, 802380), (30, 695396), (39, 534920), (40, 521547), (43, 485160), (52, 401190), (60, 347698), (65, 320952), (78, 267460), (86, 242580), (104, 200595), (120, 173849), (129, 161720), (130, 160476), (156, 133730), (172, 121290), (195, 106984), (215, 97032), (258, 80860), (260, 80238), (311, 67080), (312, 66865), (344, 60645), (390, 53492), (430, 48516), (516, 40430), (520, 40119), (559, 37320), (622, 33540), (645, 32344), (780, 26746), (860, 24258), (933, 22360), (1032, 20215), (1118, 18660), (1244, 16770), (1290, 16172), (1555, 13416), (1560, 13373), (1677, 12440), (1720, 12129), (1866, 11180), (2236, 9330), (2488, 8385), (2580, 8086), (2795, 7464), (3110, 6708), (3354, 6220), (3732, 5590), (4043, 5160), (4472, 4665)]