19756880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:205

約数の個数: 120

約数和(自身を含む): 54720456

約数和(自身を除く): 34963576

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 121, 130, 143, 157, 176, 208, 220, 242, 260, 286, 314, 440, 484, 520, 572, 605, 628, 715, 785, 880, 968, 1040, 1144, 1210, 1256, 1430, 1570, 1573, 1727, 1936, 2041, 2288, 2420, 2512, 2860, 3140, 3146, 3454, 4082, 4840, 5720, 6280, 6292, 6908, 7865, 8164, 8635, 9680, 10205, 11440, 12560, 12584, 13816, 15730, 16328, 17270, 18997, 20410, 22451, 25168, 27632, 31460, 32656, 34540, 37994, 40820, 44902, 62920, 69080, 75988, 81640, 89804, 94985, 112255, 125840, 138160, 151976, 163280, 179608, 189970, 224510, 246961, 303952, 359216, 379940, 449020, 493922, 759880, 898040, 987844, 1234805, 1519760, 1796080, 1975688, 2469610, 3951376, 4939220, 9878440, 19756880]

約数ペア:

[(1, 19756880), (2, 9878440), (4, 4939220), (5, 3951376), (8, 2469610), (10, 1975688), (11, 1796080), (13, 1519760), (16, 1234805), (20, 987844), (22, 898040), (26, 759880), (40, 493922), (44, 449020), (52, 379940), (55, 359216), (65, 303952), (80, 246961), (88, 224510), (104, 189970), (110, 179608), (121, 163280), (130, 151976), (143, 138160), (157, 125840), (176, 112255), (208, 94985), (220, 89804), (242, 81640), (260, 75988), (286, 69080), (314, 62920), (440, 44902), (484, 40820), (520, 37994), (572, 34540), (605, 32656), (628, 31460), (715, 27632), (785, 25168), (880, 22451), (968, 20410), (1040, 18997), (1144, 17270), (1210, 16328), (1256, 15730), (1430, 13816), (1570, 12584), (1573, 12560), (1727, 11440), (1936, 10205), (2041, 9680), (2288, 8635), (2420, 8164), (2512, 7865), (2860, 6908), (3140, 6292), (3146, 6280), (3454, 5720), (4082, 4840)]