20041840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2753}}^1$

素因数の和:2786

約数の個数: 80

約数和(自身を含む): 57371328

約数和(自身を除く): 37329488

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2753, 3640, 5506, 7280, 11012, 13765, 19271, 22024, 27530, 35789, 38542, 44048, 55060, 71578, 77084, 96355, 110120, 143156, 154168, 178945, 192710, 220240, 250523, 286312, 308336, 357890, 385420, 501046, 572624, 715780, 770840, 1002092, 1252615, 1431560, 1541680, 2004184, 2505230, 2863120, 4008368, 5010460, 10020920, 20041840]

約数ペア:

[(1, 20041840), (2, 10020920), (4, 5010460), (5, 4008368), (7, 2863120), (8, 2505230), (10, 2004184), (13, 1541680), (14, 1431560), (16, 1252615), (20, 1002092), (26, 770840), (28, 715780), (35, 572624), (40, 501046), (52, 385420), (56, 357890), (65, 308336), (70, 286312), (80, 250523), (91, 220240), (104, 192710), (112, 178945), (130, 154168), (140, 143156), (182, 110120), (208, 96355), (260, 77084), (280, 71578), (364, 55060), (455, 44048), (520, 38542), (560, 35789), (728, 27530), (910, 22024), (1040, 19271), (1456, 13765), (1820, 11012), (2753, 7280), (3640, 5506)]