21604520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:199

約数の個数: 128

約数和(自身を含む): 60825600

約数和(自身を除く): 39221080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 31, 35, 38, 40, 56, 62, 70, 76, 95, 124, 131, 133, 140, 152, 155, 190, 217, 248, 262, 266, 280, 310, 380, 434, 524, 532, 589, 620, 655, 665, 760, 868, 917, 1048, 1064, 1085, 1178, 1240, 1310, 1330, 1736, 1834, 2170, 2356, 2489, 2620, 2660, 2945, 3668, 4061, 4123, 4340, 4585, 4712, 4978, 5240, 5320, 5890, 7336, 8122, 8246, 8680, 9170, 9956, 11780, 12445, 16244, 16492, 17423, 18340, 19912, 20305, 20615, 23560, 24890, 28427, 32488, 32984, 34846, 36680, 40610, 41230, 49780, 56854, 69692, 77159, 81220, 82460, 87115, 99560, 113708, 139384, 142135, 154318, 162440, 164920, 174230, 227416, 284270, 308636, 348460, 385795, 540113, 568540, 617272, 696920, 771590, 1080226, 1137080, 1543180, 2160452, 2700565, 3086360, 4320904, 5401130, 10802260, 21604520]

約数ペア:

[(1, 21604520), (2, 10802260), (4, 5401130), (5, 4320904), (7, 3086360), (8, 2700565), (10, 2160452), (14, 1543180), (19, 1137080), (20, 1080226), (28, 771590), (31, 696920), (35, 617272), (38, 568540), (40, 540113), (56, 385795), (62, 348460), (70, 308636), (76, 284270), (95, 227416), (124, 174230), (131, 164920), (133, 162440), (140, 154318), (152, 142135), (155, 139384), (190, 113708), (217, 99560), (248, 87115), (262, 82460), (266, 81220), (280, 77159), (310, 69692), (380, 56854), (434, 49780), (524, 41230), (532, 40610), (589, 36680), (620, 34846), (655, 32984), (665, 32488), (760, 28427), (868, 24890), (917, 23560), (1048, 20615), (1064, 20305), (1085, 19912), (1178, 18340), (1240, 17423), (1310, 16492), (1330, 16244), (1736, 12445), (1834, 11780), (2170, 9956), (2356, 9170), (2489, 8680), (2620, 8246), (2660, 8122), (2945, 7336), (3668, 5890), (4061, 5320), (4123, 5240), (4340, 4978), (4585, 4712)]