31538780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:116

約数の個数: 144

約数和(自身を含む): 86575104

約数和(自身を除く): 55036324

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 43, 52, 62, 65, 70, 86, 91, 124, 130, 140, 155, 169, 172, 182, 215, 217, 260, 301, 310, 338, 364, 403, 430, 434, 455, 559, 602, 620, 676, 806, 845, 860, 868, 910, 1085, 1118, 1183, 1204, 1333, 1505, 1612, 1690, 1820, 2015, 2170, 2236, 2366, 2666, 2795, 2821, 3010, 3380, 3913, 4030, 4340, 4732, 5239, 5332, 5590, 5642, 5915, 6020, 6665, 7267, 7826, 8060, 9331, 10478, 11180, 11284, 11830, 13330, 14105, 14534, 15652, 17329, 18662, 19565, 20956, 23660, 26195, 26660, 28210, 29068, 34658, 36335, 36673, 37324, 39130, 46655, 50869, 52390, 56420, 69316, 72670, 73346, 78260, 86645, 93310, 101738, 104780, 121303, 145340, 146692, 173290, 183365, 186620, 203476, 225277, 242606, 254345, 346580, 366730, 450554, 485212, 508690, 606515, 733460, 901108, 1017380, 1126385, 1213030, 1576939, 2252770, 2426060, 3153878, 4505540, 6307756, 7884695, 15769390, 31538780]

約数ペア:

[(1, 31538780), (2, 15769390), (4, 7884695), (5, 6307756), (7, 4505540), (10, 3153878), (13, 2426060), (14, 2252770), (20, 1576939), (26, 1213030), (28, 1126385), (31, 1017380), (35, 901108), (43, 733460), (52, 606515), (62, 508690), (65, 485212), (70, 450554), (86, 366730), (91, 346580), (124, 254345), (130, 242606), (140, 225277), (155, 203476), (169, 186620), (172, 183365), (182, 173290), (215, 146692), (217, 145340), (260, 121303), (301, 104780), (310, 101738), (338, 93310), (364, 86645), (403, 78260), (430, 73346), (434, 72670), (455, 69316), (559, 56420), (602, 52390), (620, 50869), (676, 46655), (806, 39130), (845, 37324), (860, 36673), (868, 36335), (910, 34658), (1085, 29068), (1118, 28210), (1183, 26660), (1204, 26195), (1333, 23660), (1505, 20956), (1612, 19565), (1690, 18662), (1820, 17329), (2015, 15652), (2170, 14534), (2236, 14105), (2366, 13330), (2666, 11830), (2795, 11284), (2821, 11180), (3010, 10478), (3380, 9331), (3913, 8060), (4030, 7826), (4340, 7267), (4732, 6665), (5239, 6020), (5332, 5915), (5590, 5642)]