21581840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2267}}^1$

素因数の和:2304

約数の個数: 80

約数和(自身を含む): 60746112

約数和(自身を除く): 39164272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 56, 68, 70, 80, 85, 112, 119, 136, 140, 170, 238, 272, 280, 340, 476, 560, 595, 680, 952, 1190, 1360, 1904, 2267, 2380, 4534, 4760, 9068, 9520, 11335, 15869, 18136, 22670, 31738, 36272, 38539, 45340, 63476, 77078, 79345, 90680, 126952, 154156, 158690, 181360, 192695, 253904, 269773, 308312, 317380, 385390, 539546, 616624, 634760, 770780, 1079092, 1269520, 1348865, 1541560, 2158184, 2697730, 3083120, 4316368, 5395460, 10790920, 21581840]

約数ペア:

[(1, 21581840), (2, 10790920), (4, 5395460), (5, 4316368), (7, 3083120), (8, 2697730), (10, 2158184), (14, 1541560), (16, 1348865), (17, 1269520), (20, 1079092), (28, 770780), (34, 634760), (35, 616624), (40, 539546), (56, 385390), (68, 317380), (70, 308312), (80, 269773), (85, 253904), (112, 192695), (119, 181360), (136, 158690), (140, 154156), (170, 126952), (238, 90680), (272, 79345), (280, 77078), (340, 63476), (476, 45340), (560, 38539), (595, 36272), (680, 31738), (952, 22670), (1190, 18136), (1360, 15869), (1904, 11335), (2267, 9520), (2380, 9068), (4534, 4760)]