21271920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1453}}^1$

素因数の和:1530

約数の個数: 80

約数和(自身を含む): 67070112

約数和(自身を除く): 45798192

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 61, 80, 120, 122, 183, 240, 244, 305, 366, 488, 610, 732, 915, 976, 1220, 1453, 1464, 1830, 2440, 2906, 2928, 3660, 4359, 4880, 5812, 7265, 7320, 8718, 11624, 14530, 14640, 17436, 21795, 23248, 29060, 34872, 43590, 58120, 69744, 87180, 88633, 116240, 174360, 177266, 265899, 348720, 354532, 443165, 531798, 709064, 886330, 1063596, 1329495, 1418128, 1772660, 2127192, 2658990, 3545320, 4254384, 5317980, 7090640, 10635960, 21271920]

約数ペア:

[(1, 21271920), (2, 10635960), (3, 7090640), (4, 5317980), (5, 4254384), (6, 3545320), (8, 2658990), (10, 2127192), (12, 1772660), (15, 1418128), (16, 1329495), (20, 1063596), (24, 886330), (30, 709064), (40, 531798), (48, 443165), (60, 354532), (61, 348720), (80, 265899), (120, 177266), (122, 174360), (183, 116240), (240, 88633), (244, 87180), (305, 69744), (366, 58120), (488, 43590), (610, 34872), (732, 29060), (915, 23248), (976, 21795), (1220, 17436), (1453, 14640), (1464, 14530), (1830, 11624), (2440, 8718), (2906, 7320), (2928, 7265), (3660, 5812), (4359, 4880)]