21538020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2699}}^1$

素因数の和:2737

約数の個数: 96

約数和(自身を含む): 72576000

約数和(自身を除く): 51037980

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 57, 60, 70, 76, 84, 95, 105, 114, 133, 140, 190, 210, 228, 266, 285, 380, 399, 420, 532, 570, 665, 798, 1140, 1330, 1596, 1995, 2660, 2699, 3990, 5398, 7980, 8097, 10796, 13495, 16194, 18893, 26990, 32388, 37786, 40485, 51281, 53980, 56679, 75572, 80970, 94465, 102562, 113358, 153843, 161940, 188930, 205124, 226716, 256405, 283395, 307686, 358967, 377860, 512810, 566790, 615372, 717934, 769215, 1025620, 1076901, 1133580, 1435868, 1538430, 1794835, 2153802, 3076860, 3589670, 4307604, 5384505, 7179340, 10769010, 21538020]

約数ペア:

[(1, 21538020), (2, 10769010), (3, 7179340), (4, 5384505), (5, 4307604), (6, 3589670), (7, 3076860), (10, 2153802), (12, 1794835), (14, 1538430), (15, 1435868), (19, 1133580), (20, 1076901), (21, 1025620), (28, 769215), (30, 717934), (35, 615372), (38, 566790), (42, 512810), (57, 377860), (60, 358967), (70, 307686), (76, 283395), (84, 256405), (95, 226716), (105, 205124), (114, 188930), (133, 161940), (140, 153843), (190, 113358), (210, 102562), (228, 94465), (266, 80970), (285, 75572), (380, 56679), (399, 53980), (420, 51281), (532, 40485), (570, 37786), (665, 32388), (798, 26990), (1140, 18893), (1330, 16194), (1596, 13495), (1995, 10796), (2660, 8097), (2699, 7980), (3990, 5398)]