21441975

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{367}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 16888905

約数列:

[1, 3, 5, 15, 19, 25, 41, 57, 75, 95, 123, 205, 285, 367, 475, 615, 779, 1025, 1101, 1425, 1835, 2337, 3075, 3895, 5505, 6973, 9175, 11685, 15047, 19475, 20919, 27525, 34865, 45141, 58425, 75235, 104595, 174325, 225705, 285893, 376175, 522975, 857679, 1128525, 1429465, 4288395, 7147325, 21441975]

約数ペア:

[(1, 21441975), (3, 7147325), (5, 4288395), (15, 1429465), (19, 1128525), (25, 857679), (41, 522975), (57, 376175), (75, 285893), (95, 225705), (123, 174325), (205, 104595), (285, 75235), (367, 58425), (475, 45141), (615, 34865), (779, 27525), (1025, 20919), (1101, 19475), (1425, 15047), (1835, 11685), (2337, 9175), (3075, 6973), (3895, 5505)]