21172580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{673}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 52709496

約数和(自身を除く): 31536916

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 121, 130, 143, 220, 242, 260, 286, 484, 572, 605, 673, 715, 1210, 1346, 1430, 1573, 2420, 2692, 2860, 3146, 3365, 6292, 6730, 7403, 7865, 8749, 13460, 14806, 15730, 17498, 29612, 31460, 34996, 37015, 43745, 74030, 81433, 87490, 96239, 148060, 162866, 174980, 192478, 325732, 384956, 407165, 481195, 814330, 962390, 1058629, 1628660, 1924780, 2117258, 4234516, 5293145, 10586290, 21172580]

約数ペア:

[(1, 21172580), (2, 10586290), (4, 5293145), (5, 4234516), (10, 2117258), (11, 1924780), (13, 1628660), (20, 1058629), (22, 962390), (26, 814330), (44, 481195), (52, 407165), (55, 384956), (65, 325732), (110, 192478), (121, 174980), (130, 162866), (143, 148060), (220, 96239), (242, 87490), (260, 81433), (286, 74030), (484, 43745), (572, 37015), (605, 34996), (673, 31460), (715, 29612), (1210, 17498), (1346, 15730), (1430, 14806), (1573, 13460), (2420, 8749), (2692, 7865), (2860, 7403), (3146, 6730), (3365, 6292)]