21000273868

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{242173}}^1$

素因数の和:242366

約数の個数: 48

約数和(自身を含む): 44482520320

約数和(自身を除く): 23482246452

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 163, 266, 326, 532, 652, 1141, 2282, 3097, 4564, 6194, 12388, 21679, 43358, 86716, 242173, 484346, 968692, 1695211, 3390422, 4601287, 6780844, 9202574, 18405148, 32209009, 39474199, 64418018, 78948398, 128836036, 157896796, 276319393, 552638786, 750009781, 1105277572, 1500019562, 3000039124, 5250068467, 10500136934, 21000273868]

約数ペア:

[(1, 21000273868), (2, 10500136934), (4, 5250068467), (7, 3000039124), (14, 1500019562), (19, 1105277572), (28, 750009781), (38, 552638786), (76, 276319393), (133, 157896796), (163, 128836036), (266, 78948398), (326, 64418018), (532, 39474199), (652, 32209009), (1141, 18405148), (2282, 9202574), (3097, 6780844), (4564, 4601287), (6194, 3390422), (12388, 1695211), (21679, 968692), (43358, 484346), (86716, 242173)]