21216720

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:269

約数の個数: 160

約数和(自身を含む): 76637952

約数和(自身を除く): 55421232

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 73, 80, 84, 105, 112, 120, 140, 146, 168, 173, 210, 219, 240, 280, 292, 336, 346, 365, 420, 438, 511, 519, 560, 584, 692, 730, 840, 865, 876, 1022, 1038, 1095, 1168, 1211, 1384, 1460, 1533, 1680, 1730, 1752, 2044, 2076, 2190, 2422, 2555, 2595, 2768, 2920, 3066, 3460, 3504, 3633, 4088, 4152, 4380, 4844, 5110, 5190, 5840, 6055, 6132, 6920, 7266, 7665, 8176, 8304, 8760, 9688, 10220, 10380, 12110, 12264, 12629, 13840, 14532, 15330, 17520, 18165, 19376, 20440, 20760, 24220, 24528, 25258, 29064, 30660, 36330, 37887, 40880, 41520, 48440, 50516, 58128, 61320, 63145, 72660, 75774, 88403, 96880, 101032, 122640, 126290, 145320, 151548, 176806, 189435, 202064, 252580, 265209, 290640, 303096, 353612, 378870, 442015, 505160, 530418, 606192, 707224, 757740, 884030, 1010320, 1060836, 1326045, 1414448, 1515480, 1768060, 2121672, 2652090, 3030960, 3536120, 4243344, 5304180, 7072240, 10608360, 21216720]

約数ペア:

[(1, 21216720), (2, 10608360), (3, 7072240), (4, 5304180), (5, 4243344), (6, 3536120), (7, 3030960), (8, 2652090), (10, 2121672), (12, 1768060), (14, 1515480), (15, 1414448), (16, 1326045), (20, 1060836), (21, 1010320), (24, 884030), (28, 757740), (30, 707224), (35, 606192), (40, 530418), (42, 505160), (48, 442015), (56, 378870), (60, 353612), (70, 303096), (73, 290640), (80, 265209), (84, 252580), (105, 202064), (112, 189435), (120, 176806), (140, 151548), (146, 145320), (168, 126290), (173, 122640), (210, 101032), (219, 96880), (240, 88403), (280, 75774), (292, 72660), (336, 63145), (346, 61320), (365, 58128), (420, 50516), (438, 48440), (511, 41520), (519, 40880), (560, 37887), (584, 36330), (692, 30660), (730, 29064), (840, 25258), (865, 24528), (876, 24220), (1022, 20760), (1038, 20440), (1095, 19376), (1168, 18165), (1211, 17520), (1384, 15330), (1460, 14532), (1533, 13840), (1680, 12629), (1730, 12264), (1752, 12110), (2044, 10380), (2076, 10220), (2190, 9688), (2422, 8760), (2555, 8304), (2595, 8176), (2768, 7665), (2920, 7266), (3066, 6920), (3460, 6132), (3504, 6055), (3633, 5840), (4088, 5190), (4152, 5110), (4380, 4844)]