21980070

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:410

約数の個数: 96

約数和(自身を含む): 66044160

約数和(自身を除く): 44064090

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 139, 210, 251, 278, 315, 417, 502, 630, 695, 753, 834, 973, 1251, 1255, 1390, 1506, 1757, 1946, 2085, 2259, 2502, 2510, 2919, 3514, 3765, 4170, 4518, 4865, 5271, 5838, 6255, 7530, 8757, 8785, 9730, 10542, 11295, 12510, 14595, 15813, 17514, 17570, 22590, 26355, 29190, 31626, 34889, 43785, 52710, 69778, 79065, 87570, 104667, 158130, 174445, 209334, 244223, 314001, 348890, 488446, 523335, 628002, 732669, 1046670, 1221115, 1465338, 1570005, 2198007, 2442230, 3140010, 3663345, 4396014, 7326690, 10990035, 21980070]

約数ペア:

[(1, 21980070), (2, 10990035), (3, 7326690), (5, 4396014), (6, 3663345), (7, 3140010), (9, 2442230), (10, 2198007), (14, 1570005), (15, 1465338), (18, 1221115), (21, 1046670), (30, 732669), (35, 628002), (42, 523335), (45, 488446), (63, 348890), (70, 314001), (90, 244223), (105, 209334), (126, 174445), (139, 158130), (210, 104667), (251, 87570), (278, 79065), (315, 69778), (417, 52710), (502, 43785), (630, 34889), (695, 31626), (753, 29190), (834, 26355), (973, 22590), (1251, 17570), (1255, 17514), (1390, 15813), (1506, 14595), (1757, 12510), (1946, 11295), (2085, 10542), (2259, 9730), (2502, 8785), (2510, 8757), (2919, 7530), (3514, 6255), (3765, 5838), (4170, 5271), (4518, 4865)]