20638486720

素因数分解:

$2^6\times 5^1\times {\mathrm{151}}^1\times {\mathrm{431}}^1\times {\mathrm{991}}^1$

素因数の和:1590

約数の個数: 112

約数和(自身を含む): 49635680256

約数和(自身を除く): 28997193536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 151, 160, 302, 320, 431, 604, 755, 862, 991, 1208, 1510, 1724, 1982, 2155, 2416, 3020, 3448, 3964, 4310, 4832, 4955, 6040, 6896, 7928, 8620, 9664, 9910, 12080, 13792, 15856, 17240, 19820, 24160, 27584, 31712, 34480, 39640, 48320, 63424, 65081, 68960, 79280, 130162, 137920, 149641, 158560, 260324, 299282, 317120, 325405, 427121, 520648, 598564, 650810, 748205, 854242, 1041296, 1197128, 1301620, 1496410, 1708484, 2082592, 2135605, 2394256, 2603240, 2992820, 3416968, 4165184, 4271210, 4788512, 5206480, 5985640, 6833936, 8542420, 9577024, 10412960, 11971280, 13667872, 17084840, 20825920, 23942560, 27335744, 34169680, 47885120, 64495271, 68339360, 128990542, 136678720, 257981084, 322476355, 515962168, 644952710, 1031924336, 1289905420, 2063848672, 2579810840, 4127697344, 5159621680, 10319243360, 20638486720]

約数ペア:

[(1, 20638486720), (2, 10319243360), (4, 5159621680), (5, 4127697344), (8, 2579810840), (10, 2063848672), (16, 1289905420), (20, 1031924336), (32, 644952710), (40, 515962168), (64, 322476355), (80, 257981084), (151, 136678720), (160, 128990542), (302, 68339360), (320, 64495271), (431, 47885120), (604, 34169680), (755, 27335744), (862, 23942560), (991, 20825920), (1208, 17084840), (1510, 13667872), (1724, 11971280), (1982, 10412960), (2155, 9577024), (2416, 8542420), (3020, 6833936), (3448, 5985640), (3964, 5206480), (4310, 4788512), (4832, 4271210), (4955, 4165184), (6040, 3416968), (6896, 2992820), (7928, 2603240), (8620, 2394256), (9664, 2135605), (9910, 2082592), (12080, 1708484), (13792, 1496410), (15856, 1301620), (17240, 1197128), (19820, 1041296), (24160, 854242), (27584, 748205), (31712, 650810), (34480, 598564), (39640, 520648), (48320, 427121), (63424, 325405), (65081, 317120), (68960, 299282), (79280, 260324), (130162, 158560), (137920, 149641)]