21285700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{659}}^1$

素因数の和:709

約数の個数: 72

約数和(自身を含む): 51559200

約数和(自身を除く): 30273500

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 68, 76, 85, 95, 100, 170, 190, 323, 340, 380, 425, 475, 646, 659, 850, 950, 1292, 1318, 1615, 1700, 1900, 2636, 3230, 3295, 6460, 6590, 8075, 11203, 12521, 13180, 16150, 16475, 22406, 25042, 32300, 32950, 44812, 50084, 56015, 62605, 65900, 112030, 125210, 212857, 224060, 250420, 280075, 313025, 425714, 560150, 626050, 851428, 1064285, 1120300, 1252100, 2128570, 4257140, 5321425, 10642850, 21285700]

約数ペア:

[(1, 21285700), (2, 10642850), (4, 5321425), (5, 4257140), (10, 2128570), (17, 1252100), (19, 1120300), (20, 1064285), (25, 851428), (34, 626050), (38, 560150), (50, 425714), (68, 313025), (76, 280075), (85, 250420), (95, 224060), (100, 212857), (170, 125210), (190, 112030), (323, 65900), (340, 62605), (380, 56015), (425, 50084), (475, 44812), (646, 32950), (659, 32300), (850, 25042), (950, 22406), (1292, 16475), (1318, 16150), (1615, 13180), (1700, 12521), (1900, 11203), (2636, 8075), (3230, 6590), (3295, 6460)]