21491882139

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{7607}}^1$

素因数の和:7840

約数の個数: 64

約数和(自身を含む): 35992535040

約数和(自身を除く): 14500652901

約数列:

[1, 3, 7, 13, 21, 39, 79, 91, 131, 237, 273, 393, 553, 917, 1027, 1659, 1703, 2751, 3081, 5109, 7189, 7607, 10349, 11921, 21567, 22821, 31047, 35763, 53249, 72443, 98891, 134537, 159747, 217329, 296673, 403611, 600953, 692237, 941759, 996517, 1802859, 2076711, 2825277, 2989551, 4206671, 6975619, 7812389, 12620013, 12954721, 20926857, 23437167, 38864163, 54686723, 78724843, 90683047, 164060169, 236174529, 272049141, 551073901, 1023422959, 1653221703, 3070268877, 7163960713, 21491882139]

約数ペア:

[(1, 21491882139), (3, 7163960713), (7, 3070268877), (13, 1653221703), (21, 1023422959), (39, 551073901), (79, 272049141), (91, 236174529), (131, 164060169), (237, 90683047), (273, 78724843), (393, 54686723), (553, 38864163), (917, 23437167), (1027, 20926857), (1659, 12954721), (1703, 12620013), (2751, 7812389), (3081, 6975619), (5109, 4206671), (7189, 2989551), (7607, 2825277), (10349, 2076711), (11921, 1802859), (21567, 996517), (22821, 941759), (31047, 692237), (35763, 600953), (53249, 403611), (72443, 296673), (98891, 217329), (134537, 159747)]