19980900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{149}}^2$

素因数の和:318

約数の個数: 81

約数和(自身を含む): 63052171

約数和(自身を除く): 43071271

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 149, 150, 180, 225, 298, 300, 447, 450, 596, 745, 894, 900, 1341, 1490, 1788, 2235, 2682, 2980, 3725, 4470, 5364, 6705, 7450, 8940, 11175, 13410, 14900, 22201, 22350, 26820, 33525, 44402, 44700, 66603, 67050, 88804, 111005, 133206, 134100, 199809, 222010, 266412, 333015, 399618, 444020, 555025, 666030, 799236, 999045, 1110050, 1332060, 1665075, 1998090, 2220100, 3330150, 3996180, 4995225, 6660300, 9990450, 19980900]

約数ペア:

[(1, 19980900), (2, 9990450), (3, 6660300), (4, 4995225), (5, 3996180), (6, 3330150), (9, 2220100), (10, 1998090), (12, 1665075), (15, 1332060), (18, 1110050), (20, 999045), (25, 799236), (30, 666030), (36, 555025), (45, 444020), (50, 399618), (60, 333015), (75, 266412), (90, 222010), (100, 199809), (149, 134100), (150, 133206), (180, 111005), (225, 88804), (298, 67050), (300, 66603), (447, 44700), (450, 44402), (596, 33525), (745, 26820), (894, 22350), (900, 22201), (1341, 14900), (1490, 13410), (1788, 11175), (2235, 8940), (2682, 7450), (2980, 6705), (3725, 5364)]