19981800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{653}}^1$

素因数の和:692

約数の個数: 144

約数和(自身を含む): 71161740

約数和(自身を除く): 51179940

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 17, 18, 20, 24, 25, 30, 34, 36, 40, 45, 50, 51, 60, 68, 72, 75, 85, 90, 100, 102, 120, 136, 150, 153, 170, 180, 200, 204, 225, 255, 300, 306, 340, 360, 408, 425, 450, 510, 600, 612, 653, 680, 765, 850, 900, 1020, 1224, 1275, 1306, 1530, 1700, 1800, 1959, 2040, 2550, 2612, 3060, 3265, 3400, 3825, 3918, 5100, 5224, 5877, 6120, 6530, 7650, 7836, 9795, 10200, 11101, 11754, 13060, 15300, 15672, 16325, 19590, 22202, 23508, 26120, 29385, 30600, 32650, 33303, 39180, 44404, 47016, 48975, 55505, 58770, 65300, 66606, 78360, 88808, 97950, 99909, 111010, 117540, 130600, 133212, 146925, 166515, 195900, 199818, 222020, 235080, 266424, 277525, 293850, 333030, 391800, 399636, 444040, 499545, 555050, 587700, 666060, 799272, 832575, 999090, 1110100, 1175400, 1332120, 1665150, 1998180, 2220200, 2497725, 3330300, 3996360, 4995450, 6660600, 9990900, 19981800]

約数ペア:

[(1, 19981800), (2, 9990900), (3, 6660600), (4, 4995450), (5, 3996360), (6, 3330300), (8, 2497725), (9, 2220200), (10, 1998180), (12, 1665150), (15, 1332120), (17, 1175400), (18, 1110100), (20, 999090), (24, 832575), (25, 799272), (30, 666060), (34, 587700), (36, 555050), (40, 499545), (45, 444040), (50, 399636), (51, 391800), (60, 333030), (68, 293850), (72, 277525), (75, 266424), (85, 235080), (90, 222020), (100, 199818), (102, 195900), (120, 166515), (136, 146925), (150, 133212), (153, 130600), (170, 117540), (180, 111010), (200, 99909), (204, 97950), (225, 88808), (255, 78360), (300, 66606), (306, 65300), (340, 58770), (360, 55505), (408, 48975), (425, 47016), (450, 44404), (510, 39180), (600, 33303), (612, 32650), (653, 30600), (680, 29385), (765, 26120), (850, 23508), (900, 22202), (1020, 19590), (1224, 16325), (1275, 15672), (1306, 15300), (1530, 13060), (1700, 11754), (1800, 11101), (1959, 10200), (2040, 9795), (2550, 7836), (2612, 7650), (3060, 6530), (3265, 6120), (3400, 5877), (3825, 5224), (3918, 5100)]