20996640

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{2083}}^1$

素因数の和:2111

約数の個数: 144

約数和(自身を含む): 81926208

約数和(自身を除く): 60929568

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 210, 224, 240, 252, 280, 288, 315, 336, 360, 420, 480, 504, 560, 630, 672, 720, 840, 1008, 1120, 1260, 1440, 1680, 2016, 2083, 2520, 3360, 4166, 5040, 6249, 8332, 10080, 10415, 12498, 14581, 16664, 18747, 20830, 24996, 29162, 31245, 33328, 37494, 41660, 43743, 49992, 58324, 62490, 66656, 72905, 74988, 83320, 87486, 93735, 99984, 116648, 124980, 131229, 145810, 149976, 166640, 174972, 187470, 199968, 218715, 233296, 249960, 262458, 291620, 299952, 333280, 349944, 374940, 437430, 466592, 499920, 524916, 583240, 599904, 656145, 699888, 749880, 874860, 999840, 1049832, 1166480, 1312290, 1399776, 1499760, 1749720, 2099664, 2332960, 2624580, 2999520, 3499440, 4199328, 5249160, 6998880, 10498320, 20996640]

約数ペア:

[(1, 20996640), (2, 10498320), (3, 6998880), (4, 5249160), (5, 4199328), (6, 3499440), (7, 2999520), (8, 2624580), (9, 2332960), (10, 2099664), (12, 1749720), (14, 1499760), (15, 1399776), (16, 1312290), (18, 1166480), (20, 1049832), (21, 999840), (24, 874860), (28, 749880), (30, 699888), (32, 656145), (35, 599904), (36, 583240), (40, 524916), (42, 499920), (45, 466592), (48, 437430), (56, 374940), (60, 349944), (63, 333280), (70, 299952), (72, 291620), (80, 262458), (84, 249960), (90, 233296), (96, 218715), (105, 199968), (112, 187470), (120, 174972), (126, 166640), (140, 149976), (144, 145810), (160, 131229), (168, 124980), (180, 116648), (210, 99984), (224, 93735), (240, 87486), (252, 83320), (280, 74988), (288, 72905), (315, 66656), (336, 62490), (360, 58324), (420, 49992), (480, 43743), (504, 41660), (560, 37494), (630, 33328), (672, 31245), (720, 29162), (840, 24996), (1008, 20830), (1120, 18747), (1260, 16664), (1440, 14581), (1680, 12498), (2016, 10415), (2083, 10080), (2520, 8332), (3360, 6249), (4166, 5040)]