399102004480

素因数分解:

$2^8\times 5^1\times {\mathrm{1559}}^1\times {\mathrm{199999}}^1$

素因数の和:201579

約数の個数: 72

約数和(自身を含む): 956592000000

約数和(自身を除く): 557489995520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 1559, 3118, 6236, 7795, 12472, 15590, 24944, 31180, 49888, 62360, 99776, 124720, 199552, 199999, 249440, 399104, 399998, 498880, 799996, 997760, 999995, 1599992, 1995520, 1999990, 3199984, 3999980, 6399968, 7999960, 12799936, 15999920, 25599872, 31999840, 51199744, 63999680, 127999360, 255998720, 311798441, 623596882, 1247193764, 1558992205, 2494387528, 3117984410, 4988775056, 6235968820, 9977550112, 12471937640, 19955100224, 24943875280, 39910200448, 49887750560, 79820400896, 99775501120, 199551002240, 399102004480]

約数ペア:

[(1, 399102004480), (2, 199551002240), (4, 99775501120), (5, 79820400896), (8, 49887750560), (10, 39910200448), (16, 24943875280), (20, 19955100224), (32, 12471937640), (40, 9977550112), (64, 6235968820), (80, 4988775056), (128, 3117984410), (160, 2494387528), (256, 1558992205), (320, 1247193764), (640, 623596882), (1280, 311798441), (1559, 255998720), (3118, 127999360), (6236, 63999680), (7795, 51199744), (12472, 31999840), (15590, 25599872), (24944, 15999920), (31180, 12799936), (49888, 7999960), (62360, 6399968), (99776, 3999980), (124720, 3199984), (199552, 1999990), (199999, 1995520), (249440, 1599992), (399104, 999995), (399998, 997760), (498880, 799996)]