21080340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^2$

素因数の和:198

約数の個数: 108

約数和(自身を含む): 68530644

約数和(自身を除く): 47450304

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 83, 85, 90, 102, 153, 166, 170, 180, 204, 249, 255, 306, 332, 340, 415, 498, 510, 612, 747, 765, 830, 996, 1020, 1245, 1411, 1494, 1530, 1660, 2490, 2822, 2988, 3060, 3735, 4233, 4980, 5644, 6889, 7055, 7470, 8466, 12699, 13778, 14110, 14940, 16932, 20667, 21165, 25398, 27556, 28220, 34445, 41334, 42330, 50796, 62001, 63495, 68890, 82668, 84660, 103335, 117113, 124002, 126990, 137780, 206670, 234226, 248004, 253980, 310005, 351339, 413340, 468452, 585565, 620010, 702678, 1054017, 1171130, 1240020, 1405356, 1756695, 2108034, 2342260, 3513390, 4216068, 5270085, 7026780, 10540170, 21080340]

約数ペア:

[(1, 21080340), (2, 10540170), (3, 7026780), (4, 5270085), (5, 4216068), (6, 3513390), (9, 2342260), (10, 2108034), (12, 1756695), (15, 1405356), (17, 1240020), (18, 1171130), (20, 1054017), (30, 702678), (34, 620010), (36, 585565), (45, 468452), (51, 413340), (60, 351339), (68, 310005), (83, 253980), (85, 248004), (90, 234226), (102, 206670), (153, 137780), (166, 126990), (170, 124002), (180, 117113), (204, 103335), (249, 84660), (255, 82668), (306, 68890), (332, 63495), (340, 62001), (415, 50796), (498, 42330), (510, 41334), (612, 34445), (747, 28220), (765, 27556), (830, 25398), (996, 21165), (1020, 20667), (1245, 16932), (1411, 14940), (1494, 14110), (1530, 13778), (1660, 12699), (2490, 8466), (2822, 7470), (2988, 7055), (3060, 6889), (3735, 5644), (4233, 4980)]