20445900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:264

約数の個数: 144

約数和(自身を含む): 66245760

約数和(自身を除く): 45799860

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 19, 20, 25, 30, 34, 38, 50, 51, 57, 60, 68, 75, 76, 85, 95, 100, 102, 114, 150, 170, 190, 204, 211, 228, 255, 285, 300, 323, 340, 380, 422, 425, 475, 510, 570, 633, 646, 844, 850, 950, 969, 1020, 1055, 1140, 1266, 1275, 1292, 1425, 1615, 1700, 1900, 1938, 2110, 2532, 2550, 2850, 3165, 3230, 3587, 3876, 4009, 4220, 4845, 5100, 5275, 5700, 6330, 6460, 7174, 8018, 8075, 9690, 10550, 10761, 12027, 12660, 14348, 15825, 16036, 16150, 17935, 19380, 20045, 21100, 21522, 24054, 24225, 31650, 32300, 35870, 40090, 43044, 48108, 48450, 53805, 60135, 63300, 68153, 71740, 80180, 89675, 96900, 100225, 107610, 120270, 136306, 179350, 200450, 204459, 215220, 240540, 269025, 272612, 300675, 340765, 358700, 400900, 408918, 538050, 601350, 681530, 817836, 1022295, 1076100, 1202700, 1363060, 1703825, 2044590, 3407650, 4089180, 5111475, 6815300, 10222950, 20445900]

約数ペア:

[(1, 20445900), (2, 10222950), (3, 6815300), (4, 5111475), (5, 4089180), (6, 3407650), (10, 2044590), (12, 1703825), (15, 1363060), (17, 1202700), (19, 1076100), (20, 1022295), (25, 817836), (30, 681530), (34, 601350), (38, 538050), (50, 408918), (51, 400900), (57, 358700), (60, 340765), (68, 300675), (75, 272612), (76, 269025), (85, 240540), (95, 215220), (100, 204459), (102, 200450), (114, 179350), (150, 136306), (170, 120270), (190, 107610), (204, 100225), (211, 96900), (228, 89675), (255, 80180), (285, 71740), (300, 68153), (323, 63300), (340, 60135), (380, 53805), (422, 48450), (425, 48108), (475, 43044), (510, 40090), (570, 35870), (633, 32300), (646, 31650), (844, 24225), (850, 24054), (950, 21522), (969, 21100), (1020, 20045), (1055, 19380), (1140, 17935), (1266, 16150), (1275, 16036), (1292, 15825), (1425, 14348), (1615, 12660), (1700, 12027), (1900, 10761), (1938, 10550), (2110, 9690), (2532, 8075), (2550, 8018), (2850, 7174), (3165, 6460), (3230, 6330), (3587, 5700), (3876, 5275), (4009, 5100), (4220, 4845)]