18911865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 37158912

約数和(自身を除く): 18247047

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 41, 69, 105, 115, 123, 161, 191, 205, 287, 345, 483, 573, 615, 805, 861, 943, 955, 1337, 1435, 2415, 2829, 2865, 4011, 4305, 4393, 4715, 6601, 6685, 7831, 13179, 14145, 19803, 20055, 21965, 23493, 30751, 33005, 39155, 54817, 65895, 92253, 99015, 117465, 153755, 164451, 180113, 274085, 461265, 540339, 822255, 900565, 1260791, 2701695, 3782373, 6303955, 18911865]

約数ペア:

[(1, 18911865), (3, 6303955), (5, 3782373), (7, 2701695), (15, 1260791), (21, 900565), (23, 822255), (35, 540339), (41, 461265), (69, 274085), (105, 180113), (115, 164451), (123, 153755), (161, 117465), (191, 99015), (205, 92253), (287, 65895), (345, 54817), (483, 39155), (573, 33005), (615, 30751), (805, 23493), (861, 21965), (943, 20055), (955, 19803), (1337, 14145), (1435, 13179), (2415, 7831), (2829, 6685), (2865, 6601), (4011, 4715), (4305, 4393)]