21693555

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 20884365

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 47, 65, 117, 135, 141, 195, 235, 263, 351, 423, 585, 611, 705, 789, 1269, 1315, 1755, 1833, 2115, 2367, 3055, 3419, 3945, 5499, 6345, 7101, 9165, 10257, 11835, 12361, 16497, 17095, 27495, 30771, 35505, 37083, 51285, 61805, 82485, 92313, 111249, 153855, 160693, 185415, 333747, 461565, 482079, 556245, 803465, 1446237, 1668735, 2410395, 4338711, 7231185, 21693555]

約数ペア:

[(1, 21693555), (3, 7231185), (5, 4338711), (9, 2410395), (13, 1668735), (15, 1446237), (27, 803465), (39, 556245), (45, 482079), (47, 461565), (65, 333747), (117, 185415), (135, 160693), (141, 153855), (195, 111249), (235, 92313), (263, 82485), (351, 61805), (423, 51285), (585, 37083), (611, 35505), (705, 30771), (789, 27495), (1269, 17095), (1315, 16497), (1755, 12361), (1833, 11835), (2115, 10257), (2367, 9165), (3055, 7101), (3419, 6345), (3945, 5499)]