21170940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{379}}^1$

素因数の和:424

約数の個数: 144

約数和(自身を含む): 72777600

約数和(自身を除く): 51606660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 49, 57, 60, 70, 76, 84, 95, 98, 105, 114, 133, 140, 147, 190, 196, 210, 228, 245, 266, 285, 294, 379, 380, 399, 420, 490, 532, 570, 588, 665, 735, 758, 798, 931, 980, 1137, 1140, 1330, 1470, 1516, 1596, 1862, 1895, 1995, 2274, 2653, 2660, 2793, 2940, 3724, 3790, 3990, 4548, 4655, 5306, 5586, 5685, 7201, 7580, 7959, 7980, 9310, 10612, 11172, 11370, 13265, 13965, 14402, 15918, 18571, 18620, 21603, 22740, 26530, 27930, 28804, 31836, 36005, 37142, 39795, 43206, 50407, 53060, 55713, 55860, 72010, 74284, 79590, 86412, 92855, 100814, 108015, 111426, 144020, 151221, 159180, 185710, 201628, 216030, 222852, 252035, 278565, 302442, 352849, 371420, 432060, 504070, 557130, 604884, 705698, 756105, 1008140, 1058547, 1114260, 1411396, 1512210, 1764245, 2117094, 3024420, 3528490, 4234188, 5292735, 7056980, 10585470, 21170940]

約数ペア:

[(1, 21170940), (2, 10585470), (3, 7056980), (4, 5292735), (5, 4234188), (6, 3528490), (7, 3024420), (10, 2117094), (12, 1764245), (14, 1512210), (15, 1411396), (19, 1114260), (20, 1058547), (21, 1008140), (28, 756105), (30, 705698), (35, 604884), (38, 557130), (42, 504070), (49, 432060), (57, 371420), (60, 352849), (70, 302442), (76, 278565), (84, 252035), (95, 222852), (98, 216030), (105, 201628), (114, 185710), (133, 159180), (140, 151221), (147, 144020), (190, 111426), (196, 108015), (210, 100814), (228, 92855), (245, 86412), (266, 79590), (285, 74284), (294, 72010), (379, 55860), (380, 55713), (399, 53060), (420, 50407), (490, 43206), (532, 39795), (570, 37142), (588, 36005), (665, 31836), (735, 28804), (758, 27930), (798, 26530), (931, 22740), (980, 21603), (1137, 18620), (1140, 18571), (1330, 15918), (1470, 14402), (1516, 13965), (1596, 13265), (1862, 11370), (1895, 11172), (1995, 10612), (2274, 9310), (2653, 7980), (2660, 7959), (2793, 7580), (2940, 7201), (3724, 5685), (3790, 5586), (3990, 5306), (4548, 4655)]