21153720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25183}}^1$

素因数の和:25204

約数の個数: 64

約数和(自身を含む): 72529920

約数和(自身を除く): 51376200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25183, 50366, 75549, 100732, 125915, 151098, 176281, 201464, 251830, 302196, 352562, 377745, 503660, 528843, 604392, 705124, 755490, 881405, 1007320, 1057686, 1410248, 1510980, 1762810, 2115372, 2644215, 3021960, 3525620, 4230744, 5288430, 7051240, 10576860, 21153720]

約数ペア:

[(1, 21153720), (2, 10576860), (3, 7051240), (4, 5288430), (5, 4230744), (6, 3525620), (7, 3021960), (8, 2644215), (10, 2115372), (12, 1762810), (14, 1510980), (15, 1410248), (20, 1057686), (21, 1007320), (24, 881405), (28, 755490), (30, 705124), (35, 604392), (40, 528843), (42, 503660), (56, 377745), (60, 352562), (70, 302196), (84, 251830), (105, 201464), (120, 176281), (140, 151098), (168, 125915), (210, 100732), (280, 75549), (420, 50366), (840, 25183)]