19376721

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{401}}^1$

素因数の和:486

約数の個数: 48

約数和(自身を含む): 35118720

約数和(自身を除く): 15741999

約数列:

[1, 3, 7, 9, 13, 21, 39, 59, 63, 91, 117, 177, 273, 401, 413, 531, 767, 819, 1203, 1239, 2301, 2807, 3609, 3717, 5213, 5369, 6903, 8421, 15639, 16107, 23659, 25263, 36491, 46917, 48321, 70977, 109473, 165613, 212931, 307567, 328419, 496839, 922701, 1490517, 2152969, 2768103, 6458907, 19376721]

約数ペア:

[(1, 19376721), (3, 6458907), (7, 2768103), (9, 2152969), (13, 1490517), (21, 922701), (39, 496839), (59, 328419), (63, 307567), (91, 212931), (117, 165613), (177, 109473), (273, 70977), (401, 48321), (413, 46917), (531, 36491), (767, 25263), (819, 23659), (1203, 16107), (1239, 15639), (2301, 8421), (2807, 6903), (3609, 5369), (3717, 5213)]