21861105

素因数分解:

$3^1\times 5^1\times 7^4\times {\mathrm{607}}^1$

素因数の和:643

約数の個数: 40

約数和(自身を含む): 40872192

約数和(自身を除く): 19011087

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 607, 735, 1029, 1715, 1821, 2401, 3035, 4249, 5145, 7203, 9105, 12005, 12747, 21245, 29743, 36015, 63735, 89229, 148715, 208201, 446145, 624603, 1041005, 1457407, 3123015, 4372221, 7287035, 21861105]

約数ペア:

[(1, 21861105), (3, 7287035), (5, 4372221), (7, 3123015), (15, 1457407), (21, 1041005), (35, 624603), (49, 446145), (105, 208201), (147, 148715), (245, 89229), (343, 63735), (607, 36015), (735, 29743), (1029, 21245), (1715, 12747), (1821, 12005), (2401, 9105), (3035, 7203), (4249, 5145)]