19851780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{821}}^1$

素因数の和:877

約数の個数: 96

約数和(自身を含む): 61867008

約数和(自身を除く): 42015228

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 31, 39, 52, 60, 62, 65, 78, 93, 124, 130, 155, 156, 186, 195, 260, 310, 372, 390, 403, 465, 620, 780, 806, 821, 930, 1209, 1612, 1642, 1860, 2015, 2418, 2463, 3284, 4030, 4105, 4836, 4926, 6045, 8060, 8210, 9852, 10673, 12090, 12315, 16420, 21346, 24180, 24630, 25451, 32019, 42692, 49260, 50902, 53365, 64038, 76353, 101804, 106730, 127255, 128076, 152706, 160095, 213460, 254510, 305412, 320190, 330863, 381765, 509020, 640380, 661726, 763530, 992589, 1323452, 1527060, 1654315, 1985178, 3308630, 3970356, 4962945, 6617260, 9925890, 19851780]

約数ペア:

[(1, 19851780), (2, 9925890), (3, 6617260), (4, 4962945), (5, 3970356), (6, 3308630), (10, 1985178), (12, 1654315), (13, 1527060), (15, 1323452), (20, 992589), (26, 763530), (30, 661726), (31, 640380), (39, 509020), (52, 381765), (60, 330863), (62, 320190), (65, 305412), (78, 254510), (93, 213460), (124, 160095), (130, 152706), (155, 128076), (156, 127255), (186, 106730), (195, 101804), (260, 76353), (310, 64038), (372, 53365), (390, 50902), (403, 49260), (465, 42692), (620, 32019), (780, 25451), (806, 24630), (821, 24180), (930, 21346), (1209, 16420), (1612, 12315), (1642, 12090), (1860, 10673), (2015, 9852), (2418, 8210), (2463, 8060), (3284, 6045), (4030, 4926), (4105, 4836)]