21946340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 51403968

約数和(自身を除く): 29457628

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 151, 169, 172, 215, 260, 302, 338, 430, 559, 604, 676, 755, 845, 860, 1118, 1510, 1690, 1963, 2236, 2795, 3020, 3380, 3926, 5590, 6493, 7267, 7852, 9815, 11180, 12986, 14534, 19630, 25519, 25972, 29068, 32465, 36335, 39260, 51038, 64930, 72670, 84409, 102076, 127595, 129860, 145340, 168818, 255190, 337636, 422045, 510380, 844090, 1097317, 1688180, 2194634, 4389268, 5486585, 10973170, 21946340]

約数ペア:

[(1, 21946340), (2, 10973170), (4, 5486585), (5, 4389268), (10, 2194634), (13, 1688180), (20, 1097317), (26, 844090), (43, 510380), (52, 422045), (65, 337636), (86, 255190), (130, 168818), (151, 145340), (169, 129860), (172, 127595), (215, 102076), (260, 84409), (302, 72670), (338, 64930), (430, 51038), (559, 39260), (604, 36335), (676, 32465), (755, 29068), (845, 25972), (860, 25519), (1118, 19630), (1510, 14534), (1690, 12986), (1963, 11180), (2236, 9815), (2795, 7852), (3020, 7267), (3380, 6493), (3926, 5590)]