21195975

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 36810144

約数和(自身を除く): 15614169

約数列:

[1, 3, 5, 15, 25, 41, 61, 75, 113, 123, 183, 205, 305, 339, 565, 615, 915, 1025, 1525, 1695, 2501, 2825, 3075, 4575, 4633, 6893, 7503, 8475, 12505, 13899, 20679, 23165, 34465, 37515, 62525, 69495, 103395, 115825, 172325, 187575, 282613, 347475, 516975, 847839, 1413065, 4239195, 7065325, 21195975]

約数ペア:

[(1, 21195975), (3, 7065325), (5, 4239195), (15, 1413065), (25, 847839), (41, 516975), (61, 347475), (75, 282613), (113, 187575), (123, 172325), (183, 115825), (205, 103395), (305, 69495), (339, 62525), (565, 37515), (615, 34465), (915, 23165), (1025, 20679), (1525, 13899), (1695, 12505), (2501, 8475), (2825, 7503), (3075, 6893), (4575, 4633)]