25478920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{421}}^1$

素因数の和:538

約数の個数: 64

約数和(自身を含む): 61527600

約数和(自身を除く): 36048680

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 89, 136, 170, 178, 340, 356, 421, 445, 680, 712, 842, 890, 1513, 1684, 1780, 2105, 3026, 3368, 3560, 4210, 6052, 7157, 7565, 8420, 12104, 14314, 15130, 16840, 28628, 30260, 35785, 37469, 57256, 60520, 71570, 74938, 143140, 149876, 187345, 286280, 299752, 374690, 636973, 749380, 1273946, 1498760, 2547892, 3184865, 5095784, 6369730, 12739460, 25478920]

約数ペア:

[(1, 25478920), (2, 12739460), (4, 6369730), (5, 5095784), (8, 3184865), (10, 2547892), (17, 1498760), (20, 1273946), (34, 749380), (40, 636973), (68, 374690), (85, 299752), (89, 286280), (136, 187345), (170, 149876), (178, 143140), (340, 74938), (356, 71570), (421, 60520), (445, 57256), (680, 37469), (712, 35785), (842, 30260), (890, 28628), (1513, 16840), (1684, 15130), (1780, 14314), (2105, 12104), (3026, 8420), (3368, 7565), (3560, 7157), (4210, 6052)]