20487480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{571}}^1$

素因数の和:621

約数の個数: 128

約数和(自身を含む): 69189120

約数和(自身を除く): 48701640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 23, 24, 26, 30, 39, 40, 46, 52, 60, 65, 69, 78, 92, 104, 115, 120, 130, 138, 156, 184, 195, 230, 260, 276, 299, 312, 345, 390, 460, 520, 552, 571, 598, 690, 780, 897, 920, 1142, 1196, 1380, 1495, 1560, 1713, 1794, 2284, 2392, 2760, 2855, 2990, 3426, 3588, 4485, 4568, 5710, 5980, 6852, 7176, 7423, 8565, 8970, 11420, 11960, 13133, 13704, 14846, 17130, 17940, 22269, 22840, 26266, 29692, 34260, 35880, 37115, 39399, 44538, 52532, 59384, 65665, 68520, 74230, 78798, 89076, 105064, 111345, 131330, 148460, 157596, 170729, 178152, 196995, 222690, 262660, 296920, 315192, 341458, 393990, 445380, 512187, 525320, 682916, 787980, 853645, 890760, 1024374, 1365832, 1575960, 1707290, 2048748, 2560935, 3414580, 4097496, 5121870, 6829160, 10243740, 20487480]

約数ペア:

[(1, 20487480), (2, 10243740), (3, 6829160), (4, 5121870), (5, 4097496), (6, 3414580), (8, 2560935), (10, 2048748), (12, 1707290), (13, 1575960), (15, 1365832), (20, 1024374), (23, 890760), (24, 853645), (26, 787980), (30, 682916), (39, 525320), (40, 512187), (46, 445380), (52, 393990), (60, 341458), (65, 315192), (69, 296920), (78, 262660), (92, 222690), (104, 196995), (115, 178152), (120, 170729), (130, 157596), (138, 148460), (156, 131330), (184, 111345), (195, 105064), (230, 89076), (260, 78798), (276, 74230), (299, 68520), (312, 65665), (345, 59384), (390, 52532), (460, 44538), (520, 39399), (552, 37115), (571, 35880), (598, 34260), (690, 29692), (780, 26266), (897, 22840), (920, 22269), (1142, 17940), (1196, 17130), (1380, 14846), (1495, 13704), (1560, 13133), (1713, 11960), (1794, 11420), (2284, 8970), (2392, 8565), (2760, 7423), (2855, 7176), (2990, 6852), (3426, 5980), (3588, 5710), (4485, 4568)]