19900030

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 40979520

約数和(自身を除く): 21079490

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 61, 85, 95, 101, 122, 170, 190, 202, 305, 323, 505, 610, 646, 1010, 1037, 1159, 1615, 1717, 1919, 2074, 2318, 3230, 3434, 3838, 5185, 5795, 6161, 8585, 9595, 10370, 11590, 12322, 17170, 19190, 19703, 30805, 32623, 39406, 61610, 65246, 98515, 104737, 117059, 163115, 197030, 209474, 234118, 326230, 523685, 585295, 1047370, 1170590, 1990003, 3980006, 9950015, 19900030]

約数ペア:

[(1, 19900030), (2, 9950015), (5, 3980006), (10, 1990003), (17, 1170590), (19, 1047370), (34, 585295), (38, 523685), (61, 326230), (85, 234118), (95, 209474), (101, 197030), (122, 163115), (170, 117059), (190, 104737), (202, 98515), (305, 65246), (323, 61610), (505, 39406), (610, 32623), (646, 30805), (1010, 19703), (1037, 19190), (1159, 17170), (1615, 12322), (1717, 11590), (1919, 10370), (2074, 9595), (2318, 8585), (3230, 6161), (3434, 5795), (3838, 5185)]