197820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{157}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 690144

約数和(自身を除く): 492324

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 157, 180, 210, 252, 314, 315, 420, 471, 628, 630, 785, 942, 1099, 1260, 1413, 1570, 1884, 2198, 2355, 2826, 3140, 3297, 4396, 4710, 5495, 5652, 6594, 7065, 9420, 9891, 10990, 13188, 14130, 16485, 19782, 21980, 28260, 32970, 39564, 49455, 65940, 98910, 197820]

約数ペア:

[(1, 197820), (2, 98910), (3, 65940), (4, 49455), (5, 39564), (6, 32970), (7, 28260), (9, 21980), (10, 19782), (12, 16485), (14, 14130), (15, 13188), (18, 10990), (20, 9891), (21, 9420), (28, 7065), (30, 6594), (35, 5652), (36, 5495), (42, 4710), (45, 4396), (60, 3297), (63, 3140), (70, 2826), (84, 2355), (90, 2198), (105, 1884), (126, 1570), (140, 1413), (157, 1260), (180, 1099), (210, 942), (252, 785), (314, 630), (315, 628), (420, 471)]