21263880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:295

約数の個数: 128

約数和(自身を含む): 70761600

約数和(自身を除く): 49497720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 89, 110, 120, 132, 165, 178, 181, 220, 264, 267, 330, 356, 362, 440, 445, 534, 543, 660, 712, 724, 890, 905, 979, 1068, 1086, 1320, 1335, 1448, 1780, 1810, 1958, 1991, 2136, 2172, 2670, 2715, 2937, 3560, 3620, 3916, 3982, 4344, 4895, 5340, 5430, 5874, 5973, 7240, 7832, 7964, 9790, 9955, 10680, 10860, 11748, 11946, 14685, 15928, 16109, 19580, 19910, 21720, 23496, 23892, 29370, 29865, 32218, 39160, 39820, 47784, 48327, 58740, 59730, 64436, 79640, 80545, 96654, 117480, 119460, 128872, 161090, 177199, 193308, 238920, 241635, 322180, 354398, 386616, 483270, 531597, 644360, 708796, 885995, 966540, 1063194, 1417592, 1771990, 1933080, 2126388, 2657985, 3543980, 4252776, 5315970, 7087960, 10631940, 21263880]

約数ペア:

[(1, 21263880), (2, 10631940), (3, 7087960), (4, 5315970), (5, 4252776), (6, 3543980), (8, 2657985), (10, 2126388), (11, 1933080), (12, 1771990), (15, 1417592), (20, 1063194), (22, 966540), (24, 885995), (30, 708796), (33, 644360), (40, 531597), (44, 483270), (55, 386616), (60, 354398), (66, 322180), (88, 241635), (89, 238920), (110, 193308), (120, 177199), (132, 161090), (165, 128872), (178, 119460), (181, 117480), (220, 96654), (264, 80545), (267, 79640), (330, 64436), (356, 59730), (362, 58740), (440, 48327), (445, 47784), (534, 39820), (543, 39160), (660, 32218), (712, 29865), (724, 29370), (890, 23892), (905, 23496), (979, 21720), (1068, 19910), (1086, 19580), (1320, 16109), (1335, 15928), (1448, 14685), (1780, 11946), (1810, 11748), (1958, 10860), (1991, 10680), (2136, 9955), (2172, 9790), (2670, 7964), (2715, 7832), (2937, 7240), (3560, 5973), (3620, 5874), (3916, 5430), (3982, 5340), (4344, 4895)]