21543340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 144

約数和(自身を含む): 60328800

約数和(自身を除く): 38785460

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 26, 28, 35, 38, 49, 52, 65, 70, 76, 89, 91, 95, 98, 130, 133, 140, 178, 182, 190, 196, 245, 247, 260, 266, 356, 364, 380, 445, 455, 490, 494, 532, 623, 637, 665, 890, 910, 931, 980, 988, 1157, 1235, 1246, 1274, 1330, 1691, 1729, 1780, 1820, 1862, 2314, 2470, 2492, 2548, 2660, 3115, 3185, 3382, 3458, 3724, 4361, 4628, 4655, 4940, 5785, 6230, 6370, 6764, 6916, 8099, 8455, 8645, 8722, 9310, 11570, 11837, 12103, 12460, 12740, 16198, 16910, 17290, 17444, 18620, 21805, 21983, 23140, 23674, 24206, 32396, 33820, 34580, 40495, 43610, 43966, 47348, 48412, 56693, 59185, 60515, 80990, 82859, 87220, 87932, 109915, 113386, 118370, 121030, 153881, 161980, 165718, 219830, 226772, 236740, 242060, 283465, 307762, 331436, 414295, 439660, 566930, 615524, 769405, 828590, 1077167, 1133860, 1538810, 1657180, 2154334, 3077620, 4308668, 5385835, 10771670, 21543340]

約数ペア:

[(1, 21543340), (2, 10771670), (4, 5385835), (5, 4308668), (7, 3077620), (10, 2154334), (13, 1657180), (14, 1538810), (19, 1133860), (20, 1077167), (26, 828590), (28, 769405), (35, 615524), (38, 566930), (49, 439660), (52, 414295), (65, 331436), (70, 307762), (76, 283465), (89, 242060), (91, 236740), (95, 226772), (98, 219830), (130, 165718), (133, 161980), (140, 153881), (178, 121030), (182, 118370), (190, 113386), (196, 109915), (245, 87932), (247, 87220), (260, 82859), (266, 80990), (356, 60515), (364, 59185), (380, 56693), (445, 48412), (455, 47348), (490, 43966), (494, 43610), (532, 40495), (623, 34580), (637, 33820), (665, 32396), (890, 24206), (910, 23674), (931, 23140), (980, 21983), (988, 21805), (1157, 18620), (1235, 17444), (1246, 17290), (1274, 16910), (1330, 16198), (1691, 12740), (1729, 12460), (1780, 12103), (1820, 11837), (1862, 11570), (2314, 9310), (2470, 8722), (2492, 8645), (2548, 8455), (2660, 8099), (3115, 6916), (3185, 6764), (3382, 6370), (3458, 6230), (3724, 5785), (4361, 4940), (4628, 4655)]