21210480

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:439

約数の個数: 120

約数和(自身を含む): 72249840

約数和(自身を除く): 51039360

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 89, 90, 120, 144, 178, 180, 240, 267, 331, 356, 360, 445, 534, 662, 712, 720, 801, 890, 993, 1068, 1324, 1335, 1424, 1602, 1655, 1780, 1986, 2136, 2648, 2670, 2979, 3204, 3310, 3560, 3972, 4005, 4272, 4965, 5296, 5340, 5958, 6408, 6620, 7120, 7944, 8010, 9930, 10680, 11916, 12816, 13240, 14895, 15888, 16020, 19860, 21360, 23832, 26480, 29459, 29790, 32040, 39720, 47664, 58918, 59580, 64080, 79440, 88377, 117836, 119160, 147295, 176754, 235672, 238320, 265131, 294590, 353508, 441885, 471344, 530262, 589180, 707016, 883770, 1060524, 1178360, 1325655, 1414032, 1767540, 2121048, 2356720, 2651310, 3535080, 4242096, 5302620, 7070160, 10605240, 21210480]

約数ペア:

[(1, 21210480), (2, 10605240), (3, 7070160), (4, 5302620), (5, 4242096), (6, 3535080), (8, 2651310), (9, 2356720), (10, 2121048), (12, 1767540), (15, 1414032), (16, 1325655), (18, 1178360), (20, 1060524), (24, 883770), (30, 707016), (36, 589180), (40, 530262), (45, 471344), (48, 441885), (60, 353508), (72, 294590), (80, 265131), (89, 238320), (90, 235672), (120, 176754), (144, 147295), (178, 119160), (180, 117836), (240, 88377), (267, 79440), (331, 64080), (356, 59580), (360, 58918), (445, 47664), (534, 39720), (662, 32040), (712, 29790), (720, 29459), (801, 26480), (890, 23832), (993, 21360), (1068, 19860), (1324, 16020), (1335, 15888), (1424, 14895), (1602, 13240), (1655, 12816), (1780, 11916), (1986, 10680), (2136, 9930), (2648, 8010), (2670, 7944), (2979, 7120), (3204, 6620), (3310, 6408), (3560, 5958), (3972, 5340), (4005, 5296), (4272, 4965)]