19765980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8447}}^1$

素因数の和:8475

約数の個数: 72

約数和(自身を含む): 64576512

約数和(自身を除く): 44810532

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8447, 16894, 25341, 33788, 42235, 50682, 76023, 84470, 101364, 109811, 126705, 152046, 168940, 219622, 253410, 304092, 329433, 380115, 439244, 506820, 549055, 658866, 760230, 988299, 1098110, 1317732, 1520460, 1647165, 1976598, 2196220, 3294330, 3953196, 4941495, 6588660, 9882990, 19765980]

約数ペア:

[(1, 19765980), (2, 9882990), (3, 6588660), (4, 4941495), (5, 3953196), (6, 3294330), (9, 2196220), (10, 1976598), (12, 1647165), (13, 1520460), (15, 1317732), (18, 1098110), (20, 988299), (26, 760230), (30, 658866), (36, 549055), (39, 506820), (45, 439244), (52, 380115), (60, 329433), (65, 304092), (78, 253410), (90, 219622), (117, 168940), (130, 152046), (156, 126705), (180, 109811), (195, 101364), (234, 84470), (260, 76023), (390, 50682), (468, 42235), (585, 33788), (780, 25341), (1170, 16894), (2340, 8447)]